Question 1

Use the REGRESSION feature on a graphing calculator.
-In the table below,x represents the number of years since 2000 and y represents sales (in thousands of dollars)of a clothing company.Use the regression equation to estimate sales in the year 2006.Round to the nearest thousand dollars.

Accepted Answer

A) $14,000 
B) $20,000 
C) $2,000 
D) $8,000

Question 2

Solve the inequality and graph. Express your answer in interval notation.
-7x - 3 > 6x - 6

Accepted Answer

A)   
B)   
C)   
D)

Question 3

Use the REGRESSION feature on a graphing calculator.
-The paired data below consists of the temperature on randomly chosen days and the amount of a certain kind of plant grew (in millimeters).  Find the linear function that predicts a plant's growth as a function of the temperature.Round your answer to two decimal places.

Accepted Answer

A)   
B)   
C)   
D)

Question 4

Use the REGRESSION feature on a graphing calculator.
-The use of bottled water in the United States has shown a steady increase in recent years.The table shows the annual per capita consumption for the years 1995 - 2001.  With x being the years since 1995,find the linear function that represents this data.Round your answer to two decimal places.

Accepted Answer

A) y = 0.04x3 - 0.23x2 + 1.01x + 4.35 
B) y = 0.89x + 4.07 
C) y = 0.1x2 + 0.29x + 4.57 
D) y = 4.07x + 0.89

Question 5

Solve the inequality and graph. Express your answer in interval notation.
--23 c -4x - 3 c -19

Accepted Answer

A)   
B)   
C)   
D)

Question 6

Provide an appropriate response.
-Use the graph to find the slope-intercept form of the equation of the line.

Accepted Answer

A) y = x - 3 
B) y = 3x 
C) y = -x + 3 
D) y = x + 3

Question 7

Find the slope and y intercept of the graph of the equation.
-y = -4x + 6

Accepted Answer

A) Slope = -4,y intercept = 6 
B) Slope = -6,y intercept = -4 
C) Slope = 6,y intercept = -4 
D) Slope = 4,y intercept = -6

Question 8

Solve the problem.
-Find the Celsius temperature (to the nearest degree)when Fahrenheit temperature is 95° by solving the equation 95 =  C + 32,where F is the Fahrenheit temperature (in degrees)and C is the Celsius temperature.

Accepted Answer

A) 35°C 
B) 177°C 
C) 203°C 
D) 49°C

Question 9

Graph the equation.

-72 + 8y = 0

Accepted Answer

A)   
B)   
C)   
D)

Question 10

Find the slope and y intercept of the graph of the equation.
-y = 3x - 6

Accepted Answer

A) Slope = 6,y intercept = 3 
B) Slope = 3,y intercept = 6 
C) Slope = 3,y intercept = -6 
D) Slope = -6,y intercept = 3

Exam 1: Linear Equations and Graphs

Use the REGRESSION feature on a graphing calculator. -In the table below,x represents the number of years since 2000 and y represents sales (in thousands of dollars) of a clothing company.Use the regression equation to estimate sales in the year 2006.Round to the nearest thousand dollars.

Solve the inequality and graph. Express your answer in interval notation. -7x - 3 > 6x - 6

Solve the inequality and graph. Express your answer in interval notation. --23 c -4x - 3 c -19

Provide an appropriate response. -Use the graph to find the slope-intercept form of the equation of the line.

Find the slope and y intercept of the graph of the equation. -y = -4x + 6

Solve the problem. -Find the Celsius temperature (to the nearest degree) when Fahrenheit temperature is 95° by solving the equation 95 = C + 32,where F is the Fahrenheit temperature (in degrees) and C is the Celsius temperature.

Graph the equation. -72 + 8y = 0

Find the slope and y intercept of the graph of the equation. -y = 3x - 6