Unit 3 Functions Practice

Consider f(x) = 3x + 8 and g(x) = x + 8

Evaluate f(x) - g(x)

• 4x + 16

• 2x + 16

• 4x

• 2x

Consider: f(x) = 2x and g(x) = 3x

Evaluate f(x) + g(x)

• 5

• 6

• 5x

• 6x

Consider: f(x) = x² and g(x) = x+3

evaluate f(3) + g(3)

• 6

• 12

• 15

• 65

if f(1) = 5 and g(1) = 3,

Evaluate f(1) + g(1)

• 2

• 8

• 10

• 15

Consider: f(x) = 5x + 4

evaluate f(2)

• f(2) = 29

• f(2) = 11

• f(2) = 14

• f(2) = 56

What is the range of the graph?

• from x = 1 to x = 4

• from x = 2 to x = 6

• from y = 1 to y = 4

• from y = 2 to y = 6

What is the domain of the graph?

• from x = 1 to x = 4

• from x = 2 to x = 6

• from y = 1 to y = 4

• from y = 2 to y = 6

Given g(x) = 4x - 7, find g(-9).

• g(-9) = 29

• g(-9) = -43

• g(-9) = 43

• g(-9) = -29

What is f(8)? 

• 8
• 0
• 3
• -2

Evaluate f(-5) if f(x) = -2x - 12

• -22
• -2
• -19
• -5