Question 1

Exhibit 1-6   Along the curve in Exhibit 1-6,

Accepted Answer

A) if P = $6, then Q = 8 
B) if Q = 10, then P = $4 
C) the slope is equal to -1 
D) Q increases as P increases 
E) there is a positive relationship between Q and P 
A) if P = $6, then Q = 8 
B) if Q = 10, then P = $4 
C) the slope is equal to -1 
D) Q increases as P increases 
E) there is a positive relationship between Q and P C

Question 2

A straight line tangent to a curved line at a point

Accepted Answer

A) crosses the curved line at that point 
B) crosses the curved line at many points 
C) has the same slope as the curved line at that point 
D) is steeper than the curve at all other points 
E) has a smaller slope than all other points on the curve 
A) crosses the curved line at that point 
B) crosses the curved line at many points 
C) has the same slope as the curved line at that point 
D) is steeper than the curve at all other points 
E) has a smaller slope than all other points on the curve C

Question 3

Exhibit 1-11   In Exhibit 1-11, the slope of the line is

Accepted Answer

A) negative for all values of x 
B) positive for all values of x 
C) never zero 
D) first negative, then positive as x increases 
E) first rising, then falling as x increases 
A) negative for all values of x 
B) positive for all values of x 
C) never zero 
D) first negative, then positive as x increases 
E) first rising, then falling as x increases D

Question 4

Exhibit 1-12   The slope of the line in Exhibit 1-12 is

Accepted Answer

A) positive and constant 
B) positive and increasing 
C) positive and decreasing 
D) negative and increasing 
E) negative and decreasing 
A) positive and constant 
B) positive and increasing 
C) positive and decreasing 
D) negative and increasing 
E) negative and decreasing

Question 5

Exhibit 1-13   Compare the slopes of the tangents at points a and b in Exhibit 1-13.Which of the following statements is true?

Accepted Answer

A) The slope at a is positive, and the slope at b is negative. 
B) The slope at a is negative, and the slope at b is positive. 
C) The slope is positive at both a and b. 
D) The slope is negative at both a and b. 
E) The slope at a is equal to the slope at b. 
A) The slope at a is positive, and the slope at b is negative. 
B) The slope at a is negative, and the slope at b is positive. 
C) The slope is positive at both a and b. 
D) The slope is negative at both a and b. 
E) The slope at a is equal to the slope at b.

Question 6

The slope of a line is defined as the

Accepted Answer

A) change in the value of the variable on the vertical axis divided by the change in the value of the variable on the horizontal axis 
B) value of the variable on the horizontal axis divided by the value of the intercept on the vertical axis 
C) change in the value of the variable on the horizontal axis divided by the increase in the value of the variable on the vertical axis 
D) value of the variable on the vertical axis divided by the value of the variable on the horizontal axis 
E) change in the value of the variable on the vertical axis times the increase in the value of the variable on the horizontal axis 
A) change in the value of the variable on the vertical axis divided by the change in the value of the variable on the horizontal axis 
B) value of the variable on the horizontal axis divided by the value of the intercept on the vertical axis 
C) change in the value of the variable on the horizontal axis divided by the increase in the value of the variable on the vertical axis 
D) value of the variable on the vertical axis divided by the value of the variable on the horizontal axis 
E) change in the value of the variable on the vertical axis times the increase in the value of the variable on the horizontal axis

Question 7

The slope of a vertical straight line is infinity.

Accepted Answer

A) True 
 B)False

Question 8

Any point on a graph represents a combination of particular values of two variables.

Accepted Answer

A) True 
 B)False

Question 9

The slope of an inverted U-shaped curve is infinity at the top of the curve.

Accepted Answer

A) True 
 B)False

Question 10

A line is tangent to a curve if it

Accepted Answer

A) crosses the curve at one point 
B) touches the curve at one point, without crossing it 
C) crosses the curve at a minimum of two points 
D) never touches the curve 
E) forms a right triangle with the curve 
A) crosses the curve at one point 
B) touches the curve at one point, without crossing it 
C) crosses the curve at a minimum of two points 
D) never touches the curve 
E) forms a right triangle with the curve

Question 11

If a given value of x is associated with a particular value of y,

Accepted Answer

A) then x causes y 
B) then y causes x 
C) then x and y must be logically connected 
D) there are no other variables that affect the value of y 
E) there may be no causal relationship between x and y 
A) then x causes y 
B) then y causes x 
C) then x and y must be logically connected 
D) there are no other variables that affect the value of y 
E) there may be no causal relationship between x and y

Question 12

The slope of a U-shaped curve is infinity at the bottom of the U.

Accepted Answer

A) True 
 B)False

Question 13

Exhibit 1-10   In Exhibit 1-10, the slope of the line is

Accepted Answer

A) negative for all values of x 
B) positive for all values of x 
C) zero at x = 7 
D) first negative, then positive as x increases 
E) negative for all values of y 
A) negative for all values of x 
B) positive for all values of x 
C) zero at x = 7 
D) first negative, then positive as x increases 
E) negative for all values of y

Question 14

Exhibit 1-5   In Exhibit 1-5, curve B has a slope of

Accepted Answer

A) 0 
B) 1.25 
C) 1.33 
D) -1.25 
E) -1.33 
A) 0 
B) 1.25 
C) 1.33 
D) -1.25 
E) -1.33

Question 15

Suppose the cost of producing copper tubing is $1 per foot.If production costs were measured on the vertical axis and quantity of copper tubing were measured on the horizontal axis, which of the following lines would have the smallest slope?

Accepted Answer

A) a line representing the quantity of tubing measured in inches 
B) a line representing the quantity of tubing measured in feet 
C) a line representing the quantity of tubing measured in yards 
D) the 45-degree line 
E) any vertical line 
A) a line representing the quantity of tubing measured in inches 
B) a line representing the quantity of tubing measured in feet 
C) a line representing the quantity of tubing measured in yards 
D) the 45-degree line 
E) any vertical line

Question 16

A tangent line is a straight line

Accepted Answer

A) that intersects a curved line twice 
B) with a slope equal to infinity 
C) that touches a curved line at only one point 
D) that intersects a curved line at several points 
E) that runs along the vertical axis 
A) that intersects a curved line twice 
B) with a slope equal to infinity 
C) that touches a curved line at only one point 
D) that intersects a curved line at several points 
E) that runs along the vertical axis

Question 17

Exhibit 1-1   Point a in Exhibit 1-1 represents

Accepted Answer

A) the origin 
B) x = 0, y = 50 
C) x = 50, y = 0 
D) x + y = 50 
E) y = 0; no information is given about x 
A) the origin 
B) x = 0, y = 50 
C) x = 50, y = 0 
D) x + y = 50 
E) y = 0; no information is given about x

Question 18

Exhibit 1-2   In Exhibit 1-2, at x = 8, the

Accepted Answer

A) value of y is larger on curve A than on curve B 
B) value of y is smaller on curve A than on curve B 
C) value of y is the same on curve A as on curve B 
D) slope of line A is negative 
E) slope of line B is positive 
A) value of y is larger on curve A than on curve B 
B) value of y is smaller on curve A than on curve B 
C) value of y is the same on curve A as on curve B 
D) slope of line A is negative 
E) slope of line B is positive

Question 19

Exhibit 1-5   In Exhibit 1-5, curve A has a __________ slope that is __________ at every point.

Accepted Answer

A) positive; constant 
B) positive; changing 
C) negative; constant 
D) negative; changing 
E) changing; constant 
A) positive; constant 
B) positive; changing 
C) negative; constant 
D) negative; changing 
E) changing; constant

Question 20

Exhibit 1-2   In Exhibit 1-2, when y is less than 12, the

Accepted Answer

A) value of x is larger on curve A than on curve B 
B) value of x is smaller on curve A than on curve B 
C) value of x is the same on curve A as on curve B 
D) slope of line A is negative 
E) slope of line B is positive 
A) value of x is larger on curve A than on curve B 
B) value of x is smaller on curve A than on curve B 
C) value of x is the same on curve A as on curve B 
D) slope of line A is negative 
E) slope of line B is positive

Exam 1: Appendix--Understanding Graphs

Exhibit 1-6 Along the curve in Exhibit 1-6,

A straight line tangent to a curved line at a point

Exhibit 1-11 In Exhibit 1-11, the slope of the line is

Exhibit 1-12 The slope of the line in Exhibit 1-12 is

Exhibit 1-13 Compare the slopes of the tangents at points a and b in Exhibit 1-13.Which of the following statements is true?

The slope of a line is defined as the

The slope of a vertical straight line is infinity.

Any point on a graph represents a combination of particular values of two variables.

The slope of an inverted U-shaped curve is infinity at the top of the curve.

A line is tangent to a curve if it

If a given value of x is associated with a particular value of y,

The slope of a U-shaped curve is infinity at the bottom of the U.

Exhibit 1-10 In Exhibit 1-10, the slope of the line is

Exhibit 1-5 In Exhibit 1-5, curve B has a slope of

Suppose the cost of producing copper tubing is $1 per foot.If production costs were measured on the vertical axis and quantity of copper tubing were measured on the horizontal axis, which of the following lines would have the smallest slope?

A tangent line is a straight line

Exhibit 1-1 Point a in Exhibit 1-1 represents

Exhibit 1-2 In Exhibit 1-2, at x = 8, the

Exhibit 1-5 In Exhibit 1-5, curve A has a __________ slope that is __________ at every point.

Exhibit 1-2 In Exhibit 1-2, when y is less than 12, the

The Art and Science of Economic Analysis

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Exhibit 1-5 In Exhibit 1-5, curve A has a slope that is at every point.