Functions Review

Write an equation for the line that has a slope of 1/2 and passes through the point (-2,5).

Two companies offer tractors for rental.They each require a deposit and then a charge per hour to use a tractor. Company #1 charges a $25 deposit and then $18 per hour. The cost to use a tractor from Company #2 is shown in this table. Which company charges more per hour to use the tractor and how much more?

• Company #1, $5

• Company #2, $5

• Company #1, $4

• Company #2, $4

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)

Is this set of ordered pairs a function or not a function? 

• Function

• Not a Function 

Which sets of ordered pairs are functions?

Choose all that apply.

• (9, -1), (8, -2), (7, -3), (6, -4)

• (5, -1), (5, -2,), (5,12), (5, 0)

• (4, 2), (-4, 2), (2, 4), (-2, -4)

• (1, -4), (2, -4,), (3, -4), (4, -4)

• (5, 8), (4, 9), (5, 9), (4, 8)

Is this graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Which two functions have a graph that is a line?

• y = 2x²– 9x

• y = –3^x

• y = 2x – 9

Select all of the following equations which define linear functions.

• y = x² – 7

• y = 6 – 5x

• y = 9x