Interpreting Function Notation Word Problems

What does S(7) represent?

• The salary of a babysitter who worked 7 hours.

• The hours worked if the salary is $7.

• The salary of a babysitter who worked 0 hours.

• The hours worked if the salary is $0.

What does S(4)=70 represent?

• The salary of a babysitter who worked 4 hours is $70.

• The number of hours the babysitter worked is 70.

• The salary of a babysitter who worked 70 hours is $4.

• The salary of the babysitter who worked 0 hours is $4.

How far did the car travel after 2 hours?

• 80 miles

• 160 miles

• 240 miles

• 320 miles

Function F shows the distance a car traveled after h, hours. The graph is shown. Estimate F(6) and explain its meaning.

• 240;

  240 miles were traveled after 6 hours.

• 240;

  240 hours passed after 6 miles were driven.

• 320;

  320 miles were traveled after 6 hours.

• 320;

  320 hours passed after 6 miles were driven.

Function F shows the distance a car traveled after h, hours. The graph is shown. A second car's distance can be represented by the function G (h) = 55h. Which car has traveled further after 4 hours, and by how many miles?

• The first car; 160 miles.

• The second car; 165 miles.

• The second car; 60 miles.

• The first car; 90 miles.

The function C(x) = 25x + 50 represents the labor cost, in dollars, for Contractor A to build a deck, where x is the number of hours of labor.

Explain the meaning of C(2) = 100

• The labor cost for Contractor A is $100 for 2 hours.

• The labor cost for Contractor A is $2 for 100 hours.

• The labor cost for Contractor A is $25 for 2 hours.

• The labor cost for Contractor A is $100 for 25 hours.

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.

The function R represents the rain total rainfall, in cm, after x hours. The graph of the function is shown.

What was the rainfall after 2 hours?

• 1 cm

• 3 cm

• 4 cm

• 5 cm

If f(x) = 3x - 9, find f(5).

• f(5) = 6

• f(5) = 16

• f(5) = -4

• f(5) = 24

How do you read f(x)?

• "f x"

• "f of x"

• "f parenthesis x"

• "f with an x inside parenthesis"