Evaluating Functions

If I know that f(2) = 4, what is another way I can write my answer?

• 2,4

• (2, 4)

• That is the only way to write it.

If f(x) = 2x + 1, find f(1).

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

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

• -1

• 1

• 5

• -5

f(x) is the same thing as ______.

• y

• x

• input

• an equation

Given g(x) =
 4x - 7, find g(-9). 

• g(-9) = 29

• g(-9) = -43

Given g(x) = 4x - 7 and g(x) = 13, find x.

• g(-9) = 29

• x = 5

• g(-9) = -43

• x = 5/4

What is the domain?

• None of the answer choices

What is the range?

• [-3, 4]

• (-3, 4)

• (-3, 4]

• (-2, 3]

• [4, -3]

The set of all x-values used to graph a function are called the ____.

• Domain

• Range

• Relation

• Function

Consider the function: g(x) = 4x − 1 For which value of x does g(x) = 19? (Hint: Determine which number can be substituted in for x to give you a solution of 19.)

• 39

• 41

• 5

• 38