Evaluating Functions Graphically

2.03 (Function Notation: Algebraically & Graphically)

I can evaluate function notation algebraically & Graphically.

Multiple Choice

Do Now :

Evaluate f(-2) if f(x) = x²+ 3.

• -1

• 1

• 7

• -7

How to Evaluate functions graphically?

• Remember f(x) is another way to say y

• Find the corresponding value on either the x or y axis.

• Find f(-1):

• Find f(2):

Example

Find f(-5):

Find g(-10):

Find h(-4):

Multiple Choice

Given f(x) =

2x² + 5x - 17, find f(-1).

• f(-1) = -20

• f(-1) = -24

Multiple Choice

What is f(8)?

• 8

• 0

• 3

• -2

Multiple Choice

What is x if

f(x) = -2?

• 4

• 0

• 3

• 8

Multiple Choice

What is f(1)?

• 1

• 5

• 0

• 4