Domain and Range and Evaluating Function Notation

Evaluate r(3)

• r(3) = 16

• r(3) = 12

• r(3) = 13

• r(3) = 0

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

• Let x = 2

• Let y = 2

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.

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

What is the domain of the graph?

• [1,∞)

• (-∞,1]

• (-∞,∞)

• [-∞,∞]

• f(-2) = -1

• f(-2) = -9

• f(-2) = 9

• f(-2) = 0

Ms. Brackemyer is collecting pencils.  The function p(x)=5x+12 tells us the total amount of pencils Ms. Brackemyer has after collecting for x number of days.  What is the meaning of p(8)=52?

• Ms. Brackemyer starts with 8 pencils and ends with 52.

• After 8 days, Ms. Brackemyer has 52 pencils.

• Ms. Brackemyer starts with 52 pencils and gets 4 more every day.

• Every day, Ms. Brackemyer gets 4 new pencils until she has 52.

All of the x values or inputs are called what?

• Domain

• Range

• Relation

• Function