Question 1

If x causes y, then

Accepted Answer

A)  x and y are inversely related 
B)  y is a dependent variable 
C)  other variables don't matter 
D)  y must, in turn, cause x 
E)  x and y are always in a direct relation to each other 
A)  x and y are inversely related 
B)  y is a dependent variable 
C)  other variables don't matter 
D)  y must, in turn, cause x 
E)  x and y are always in a direct relation to each other B

Question 2

NARRBEGIN: Exhibit 1-6
Exhibit 1-8
  
-The slope of a vertical line is

Accepted Answer

A)  infinitely large 
B)  zero 
C)  positive 
D)  negative 
E)  infinitely small 
A)  infinitely large 
B)  zero 
C)  positive 
D)  negative 
E)  infinitely small A

Question 3

NARRBEGIN: Exhibit 1-8
Exhibit 1-10
  
-In Exhibit 1-8, 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 C

Question 4

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 5

NARRBEGIN: Exhibit 1-1
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 6

If slope = -2 for a line on a graph with x on the horizontal axis and y on the vertical axis, then if

Accepted Answer

A)  x increases by 4, y increases by 8 
B)  x increases by 4, y increases by 2 
C)  y increases by 4, x increases by 8 
D)  x = 4, y = 8 
E)  x increases by 4, y decreases by 8 
A)  x increases by 4, y increases by 8 
B)  x increases by 4, y increases by 2 
C)  y increases by 4, x increases by 8 
D)  x = 4, y = 8 
E)  x increases by 4, y decreases by 8

Question 7

NARRBEGIN: Exhibit 1-12
Exhibit 1-14
  
-A line on a graph will shift if

Accepted Answer

A)  the independent variable changes 
B)  there are no changes in any variables considered in the model 
C)  there is a change in a variable that had previously been assumed to be constant 
D)  a change in the independent variable causes a change in the dependent variable 
E)  the independent variable and the dependent variable are unrelated 
A)  the independent variable changes 
B)  there are no changes in any variables considered in the model 
C)  there is a change in a variable that had previously been assumed to be constant 
D)  a change in the independent variable causes a change in the dependent variable 
E)  the independent variable and the dependent variable are unrelated

Question 8

On a graph with x on the horizontal axis and y on the vertical axis, the origin is

Accepted Answer

A)  the point where x = 0 and y = 0 
B)  any point where x = 0 
C)  any point where y = 0 
D)  where a curve intersects the vertical axis 
E)  where a curve intersects the horizontal axis 
A)  the point where x = 0 and y = 0 
B)  any point where x = 0 
C)  any point where y = 0 
D)  where a curve intersects the vertical axis 
E)  where a curve intersects the horizontal axis

Question 9

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 10

NARRBEGIN: Exhibit 1-13
Exhibit 1-15
  
-Refer to Exhibit 1-13. The reason that Line (a) would shift to the position of Line (b) is

Accepted Answer

A)  a change in quantity 
B)  a change in price 
C)  a change in an assumption about the relationship between the two variables observed 
D)  a change from a positive relation to a negative relation 
E)  a change from a negative relation to a positive relation 
A)  a change in quantity 
B)  a change in price 
C)  a change in an assumption about the relationship between the two variables observed 
D)  a change from a positive relation to a negative relation 
E)  a change from a negative relation to a positive relation

Question 11

NARRBEGIN: Exhibit 1-6
Exhibit 1-8
  
-The slope of the line in Exhibit 1-6 is

Accepted Answer

A)  0.1 
B)  1 
C)  10 
D)  -0.1 
E)  -10 
A)  0.1 
B)  1 
C)  10 
D)  -0.1 
E)  -10

Question 12

A U-shaped curve has a positive slope everywhere.

Accepted Answer

A) True 
 B)False

Question 13

NARRBEGIN: Exhibit 1-12
Exhibit 1-14
  
-Using Exhibit 1-12, calculate the slope of the curve where x equals 50.

Accepted Answer

A)  0 
B)  1 
C)  infinite 
D)  -1 
E)  the slope cannot be determined because there is no tangent line 
A)  0 
B)  1 
C)  infinite 
D)  -1 
E)  the slope cannot be determined because there is no tangent line

Question 14

NARRBEGIN: Exhibit 1-2-1
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 15

One economic application of the slope of a line is

Accepted Answer

A)  measuring unlimited wants 
B)  behavioral analysis 
C)  marginal analysis 
D)  allocative efficiency 
E)  rational self-interest 
A)  measuring unlimited wants 
B)  behavioral analysis 
C)  marginal analysis 
D)  allocative efficiency 
E)  rational self-interest

Question 16

NARRBEGIN: Exhibit 1-2-1
Exhibit 1-2
  
-In Exhibit 1-2, at y = 10, 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

Question 17

The slope of a vertical straight line is infinity.

Accepted Answer

A) True 
 B)False

Question 18

The slope of a horizontal straight line is infinity.

Accepted Answer

A) True 
 B)False

Question 19

NARRBEGIN: Exhibit 1-2-1
Exhibit 1-2
  
-In Exhibit 1-2, at y = 14, 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

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 1: Appendix: Understanding Graphs

If x causes y, then

NARRBEGIN: Exhibit 1-6 Exhibit 1-8 -The slope of a vertical line is

NARRBEGIN: Exhibit 1-8 Exhibit 1-10 -In Exhibit 1-8, the slope of the line is

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?

NARRBEGIN: Exhibit 1-1 Exhibit 1-1 -Point a in Exhibit 1-1 represents

If slope = -2 for a line on a graph with x on the horizontal axis and y on the vertical axis, then if

NARRBEGIN: Exhibit 1-12 Exhibit 1-14 -A line on a graph will shift if

On a graph with x on the horizontal axis and y on the vertical axis, the origin is

A line is tangent to a curve if it

NARRBEGIN: Exhibit 1-13 Exhibit 1-15 -Refer to Exhibit 1-13. The reason that Line (a) would shift to the position of Line (b) is

NARRBEGIN: Exhibit 1-6 Exhibit 1-8 -The slope of the line in Exhibit 1-6 is

A U-shaped curve has a positive slope everywhere.

NARRBEGIN: Exhibit 1-12 Exhibit 1-14 -Using Exhibit 1-12, calculate the slope of the curve where x equals 50.

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

One economic application of the slope of a line is

NARRBEGIN: Exhibit 1-2-1 Exhibit 1-2 -In Exhibit 1-2, at y = 10, the

The slope of a vertical straight line is infinity.

The slope of a horizontal straight line is infinity.

NARRBEGIN: Exhibit 1-2-1 Exhibit 1-2 -In Exhibit 1-2, at y = 14, the

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

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