Is it a Function? and Evaluating Functions

f(x)=4x+5
f(4)=

• 21
• -11
• -31
• 25

Tags

CCSS.HSF.IF.A.2

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

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)

Tags

CCSS.8.F.A.1

If f(x) = 2x² + 5x - 3, evaluate f(-1).

• f(-1) = -6

• f(-1) = 1

• f(-1) = -10

• f(-1) = -1

Tags

CCSS.HSF.IF.A.2

Evaluate f(33)

• 33
• 11
• 10
• 8

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Tags

CCSS.8.F.A.1

• Function
• Not a Function

This ordered pairs below represent the scores of Marshall's quiz attempts and scores. Identify whether the data set represents a function.

{(Quiz #1, 20), (Quiz #2, 15), (Quiz #3, 20), (Quiz #4, 12)}

• Yes, it is a function

• No, it is not a function

Tags

CCSS.8.F.A.1

Does the graph represent a function?

• Yes

• No

Does the graph represent a function?

• Yes

• No