Review on Evaluating Functions

What is g(7) if:

• -17

• -13 

• 13       

• 17

Evaluate the function when x = 6 

• f(6) = -5

• f(6) = 4

• f(6) = 2

• f(6) = 7

• -128

• 64

• 64

• 128

• 0

• 5

• 1

• 60

Given that f(x) = 2x - 2 and g(x) = 5x.  Find the value of f(0) + g(3).

• 13

• 15

• 17

• 0

Ms. Brackemyer is collecting pencils.  The function p(x)=5x+12 tells us the total amount of pencils Ms. Brackemyer has after collecting for x number of days.  What is the meaning of p(8)=52?

• Ms. Brackemyer starts with 8 pencils and ends with 52.

• After 8 days, Ms. Brackemyer has 52 pencils.

• Ms. Brackemyer starts with 52 pencils and gets 4 more every day.

• Every day, Ms. Brackemyer gets 4 new pencils until she has 52.

A company is selling bubble gum.  The function g(x)=3x+4 tells the company how much to charge if someone buys x packages of bubble gum.  Find g(8) and tell what it means within the context of the problem.

• g(8)=8.  This means that after 8 packages of gum, the company makes $8.

• g(8)=42.  This means that 8 packages of gum costs $42.

• g(8)=28.  This means that 8 packages of gum costs $28.

• g(8)=24.  This means that 8 packages of gum costs $24.

Evaluate f(x) = x² for f(-8)

• 64

• -64

• -16

• 16

Evaluate f(t)=-2t²+ 1 for f(-3)

• 19
  

• 37

• -17

• -11

A company is selling bubble gum. The function g(x)=3x+4 tells the company how much to charge if someone buys x packages of bubble gum. Find g(8) and tell what it means within the context of the problem.

• g(8)=8. This means that after 8 packages of gum, the company makes $8.

• g(8)=42. This means that 8 packages of gum costs $42.

• g(8)=28. This means that 8 packages of gum costs $28.

• g(8)=24. This means that 8 packages of gum costs $24.