Math 8 Unit 4 Review

(Mod 6) Which of the relationships below is a function?

• (6,3), (5,2) , (6,8) , (0,7)
• (8, 2), (1, 7), (−1, 2), (1, 9)
• (4, 3), (3, 0), (−1, 3), (2, 7)
• (7, 1), (0, 0), (6, 2), (0, 4)

(Mod 6) What is the equation for the graph?

• y= 4x+ 3
• y=−4x− 0.75
• y=−4x+ 3
• y= 4x− 0.75

(Mod 6) Which term does NOT correctly describe the relationship shown in the table?

• function
• linear
• proportional
• non nonproportional

(Mod 6)
As part of a science experiment, Greta measured the amount of water flowing from Container A to Container B. Container B had half a gallon of water in it to start the experiment. Greta found that the water was flowing at a rate of two gallons per hour. Which equation represents the amount of water in Container B?

• y= 2x
• y= 0.5x
• y= 2x + 0.5
• y= 0.5x + 2

(Mod 6)
Carl and Jeannine both work at appliance stores. Carl earns a weekly salary of $600 plus $40 for each appliance he sells. The equation p= 50n+ 550 represents the amount of money Jeannine earns in a week, p ($), as a function of the number of appliances she sells, n. Which of the following statements is true?

• Carl has a greater salary and a greater rate per appliance sold.
• Jeannine has a greater salary and a greater rate per appliance sold.
• Carl will earn more than Jeannine if they each sell 10 appliances in a given week.
• Both Carl and Jeannine earn the same amount if they each sell 5 appliances in a given week.

(Mod 6)
Jacy has a choice of cell phone plans. Plan A is to pay $260 for the phone and then pay $70 per Write an equation to represent the total cost, c, of Plan A for m months. month for service. Plan B is to get the phone for free and pay $82 per month for service. Write an equation to represent the total cost, c, of Plan A for m months.

• c = 82m
• c = 82m +260
• c = 260m +70
• c = 70m + 260

(Mod 6)
Jacy has a choice of cell phone plans. Plan A is to pay $260 for the phone and then pay $70 per Write an equation to represent the total cost, c, of Plan A for m months. month for service. Plan B is to get the phone for free and pay $82 per month for service. Write an equation to represent the total cost, c, of Plan B for m months.

• c = 82m
• c = 82m +260
• c = 260m +70
• c = 70m + 260

(Mod 6)
Jacy has a choice of cell phone plans. Plan A is to pay $260 for the phone and then pay $70 per Write an equation to represent the total cost, c, of Plan A for m months. month for service. Plan B is to get the phone for free and pay $82 per month for service. If Jacy plans to keep the phone for 24 months, which plan is cheaper? Explain

• Plan A because it costs less per month.
• Plan A because it costs $28 less.
• Plan B because the phone is free.
• Plan B because it costs $28 less.

(Mod 7) The triangle and the rectangle have the same perimeter. Find the value of x.

• 2
• 10
• 18
• 24

(Mod 7) What is the solution of the equation 8(3x+ 4) = 2(12x- 8)?

• x=-2
• x= 2
• no solution
• infinitely many solutions