Evaluating Functions Using Function Notation

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

How do you read f(x)?

• f x

• f of x

• f parenthesis x

• f with an x inside parenthesis

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

• 21
• -11
• -31
• 25

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

• f(-1) = 3

• f(-1) = 2

• f(-1) = 4

• f(-1) = -1

Evaluate f(-2) if f(x) = x + 3

• -1

• 1

• 5

• -5

If h(x) = -5x + 7,

Evaluate h(2).

• -2

• 3

• -18

• -3

Given h(x) = 5 - 9x, find h(8).

• h(8) = -360

• h(8) = -67

Given f(x) = 2x² + 5x - 17, find f(-1). 

• f(-1) = -20
• f(-1) = -24

Given h(x) = -x + 3, find h(5).

• h(5) = 8

• h(5) = -2

f(x) is the same thing as ______.

• y
• x
• input
• an equation