Function Notation Finding Input

Function Q gives a puppy's weight in pounds as function of its age in months.

Write the following in function notation: When the puppy turned 12 months old, it weighed 19.6 pounds.

• Q(12) = 19.6

• Q(19.6) = 12

• Q(1) = 19.6

• Q(19.6) = 1

The monthly cost a data plan can be represented by the function

C(x) = 30x + 5

What is C(0.7)?

• 26

• 30

• 5

• 0.7

The graph shows the height of the squirrel, h (feet), as a function of time, t (seconds). Solve h(t) = 0.

• t = 9

• t = 4

• t = 1.5

• t = 10

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

• y = 2x-3

• f = 2x - 3

• f(x) = 2x - 3

• Can't be written in function notation

Find f(2)

• 5

• 4

• 3

• 0

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

• -1

• 1

• 5

• -5

Given the function, f, shown on the graph, what is the value of f(3)?

• 0

• 2

• 6

• 1

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"

f(x) is the same thing as ______.

• y

• x

• input

• an equation