1) Practice: Summarizing Fill in the blanks to complete the definition.

A is an algebraic relationship in which one quantity on another.

2) Practice: Fill in the blanks to describe each function.

The height of a tree, h, depends on its age, a.
The is a function of .
The function notation is __ ( __ ).

The area of a square, a, depends on its side length, s.
The is a function of . The function notation is __ ( __ ).

The sales tax, s, depends on the price, p.
The is a function of . The function notation is __ ( __ ).

3) Practice: Summarizing

Interpret function notation.

The area of a square, in square feet, depends on the length of its sides, in feet. This is written in function notation as a(s). What is the best interpretation of a(4) = 16?

4) Practice: Summarizing

Evaluate the function for the given value.

The function c(x) = 2.5x + 15 shows the cost, in dollars, to make x necklaces.

What is c(10)?

What is c(15)?

What is the best interpretation of c(20) = 65 in terms of the problem?

5) Practice: Summarizing

Fill in the blanks to complete the definitions.

The is the set of inputs for a function.

The is the set of outputs for a function.