Test Functions grade 8

Which graph does NOT pass the vertical line test?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

• Function
• Not a Function

.

• Function
• Not a Function

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Which two functions have a graph that is a line?

• y = 3/x + 2

• y = 2x²– 9x

• y = –3^x

• y = 2x – 9

• y = –6x/7

Dave owns a lawn business. He charges $10 per hour and a $25 dollar disposal fee. What is the correct equation Dave would use to find out how much to charge his customers?

• y = 25x + 10
• x = 25y + 10
• y = 10x +25
• x = 10y + 25

Who has the greater rate of change?

• Hunter has the greater rate of change.
• Casey has the greater rate of change 
• They have the same rate of change

What is the slope of the points (5,1) and (6,2)

• -1

• 1

• 3

Sally predicts that a straight line will result from connecting the plotted points listed in the following function tale.  Which statement justifies Sally's prediction?

• The difference between each pair of consecutive y-values varies
• The difference between each pair of consecutive x-values varies
• The x-values and the y-values change at constant rates
• The x-values and the y-values change at different rates

What is the rate of change shown in the table?

• 8
• 1
• -2
• -3