8th Grade Functions

• A

• B

• C

• D

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)

Choose ALL terms below that refer to the point where a line crosses the y-axis

• "b"

• rate of change

• y-intercept

• x-coordinate

• initial value

The graph of which equation is shown?

• y = 4x + 3

• y = -4x - 0.75

• y = -4x + 3

• y = 4x - 0.75

Choose ALL equations below that represent nonproportional relationships

• y = 5x

• y = -5x + 3

• y = 5x - 3

• y = 1/3x

• y = 5 - 3x

Which term does NOT correctly describe the relationship shown in the table?

• function

• linear

• proportional

• nonproportional

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

Carl and Jean both work at appliance stores. Carl earns a weekly salary of $600 plus $40 for each appliance sold. The equation p = 50n + 550 represents the amount of money Jean earns in a week. Which of the following statements is true?

• Carl has a greater salary and a greater rate per appliance sold

• Jean has a greater salary and greater rate per appliance sold

• Carl will earn more than Jean if they each sell 10 appliances in a week

• Both Carl and Jean earn the same amount if they each sell 5 appliances in a given week

The table represents a linear relationship. Find the slope of the relationship.

Find the y-intercept of the table.