Functions Review

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

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Evaluate f(-4) for the function f(x)=3x²-5

• f(-4) = 43
• f(-4) = 139
• f(-4) = -52
• f(-4) = -149

Tags

CCSS.HSF.IF.A.2

Select the sets of ordered pairs that represent a function

• (9,5) (10,5) (9,5) (10,5) (8,7)

• (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 the graph pictured a function?

• Yes
• No

Tags

CCSS.HSA.REI.D.10

CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.5

The graph of f(x) is shown. What is the value of f(x) when x= -1?

• -2

• -3

• -1

• 0

Is the graph pictured a function?

• Yes
• No

Tags

CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.5

Charles bakes a pie in the oven for 25 minutes. Let  $f\left(t\right)=0.16t^2\ +45\$  be the temperature of the pie t minutes after you placed it in the oven. Which of the following statements are true for the given function?

•  $f\left(0\right)=45\$  means that when the pie was placed in the oven, its temperature was 45 degrees.

• To find the temperature of the pie after 15 minutes of being in the oven, we would need to find when f(t)=15.

• After 7 minutes, the temperature of the pie was 55.24 degrees Fahrenheit.

• If the pie was in the oven for 10 minutes and the temperature was 61 degrees Fahrenheit, then it could be represented as  $f\left(61\right)\ =\ 10$  

• The temperature of the pie when the baker takes it out of the can be represented by  $f\left(25\right)=145$  

Using the functions f(x)=-4x+11 evaluate f(3)

• f(3)=23

• f(3)=-1

• f(3)=-23

• f(3)=1

The graph of f(x) is shown. What is x when f(x) = 6?

• 4

• -1

• 5

• -6

Which graph represents a function?

• 
• 
• 
• 

Tags

CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7