Using Functions CLU

Select ALL that apply.

f(x) is the same thing as ______.

• y
• x
• input
• output

g(15) = -1
Convert to an ordered pair in the format (x, y).

• (15, -1)

• (-1, 15)

• (1, 15)

• (-15, -1)

• (15, 1)

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

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

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

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

After how many hours was the rainfall 2 cm?

• 1 hour

• 2 hours

• 3 hours

• 4 hours

The function B(x) = 8x + 25 represents the cost (in dollars) of renting a bicycle for x days.

What is the cost of renting a bicycle for 5 days?

• $65

• $40

• $125

• $57

A babysitter's salary can be represented by a function, S, where the input is the hours worked.

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 is x if
f(x) = -2?

• 4
• 0
• 3
• 8

Tyler filled up their bathtub, took a bath, and then drained the tub. The function B gives the depth of the water, in inches, t minutes after they began to fill the bathtub.

Explain the meaning of

B(9) = 11

• The depth of the water at 11 minutes was 9 inches.

• The depth of the water at 9 minutes was 11 inches.

• After 11 minutes, the water rose 9 inches.

• The water was 9 inches deep after 11 minutes.

• -3

• -1

• 1

• 3