Evaluating Functions and Domain and Range

Evaluate r(3)

• r(3) = 16

• r(3) = 12

• r(3) = 13

• r(3) = 0

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

What is the domain of the graph?

• [1,∞)

• (-∞,1]

• (-∞,∞)

• [-∞,∞]

• f(-2) = -1

• f(-2) = -9

• f(-2) = 9

• f(-2) = 0

Evaluate f(x) = x² for f(-8)

• 64

• -64

• -16

• 16

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

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

If a question asks you to find f(2), what does that mean?

• Let x = 2

• Let y = 2

If f(x) = 2x + 1, what would be your first step to find f(1)?

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

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.