Function Representation Quiz

Function P represents the perimeter (output), in inches, of a square with side length x inches (input). The top row is for inputs and the bottom row is for outputs - fill in the table.

Write an equation to represent function P in function notation.

Functions F and A are defined by the following equations. Which function has a greater value when x is 2.5? f(x) = 80 - 15x, A(x) = 25 + 10x

• f(x)

• A(x)

An equilateral triangle has three sides of equal length. Function P gives the perimeter of an equilateral triangle of side length s. Find P(2)

An equilateral triangle has three sides of equal length. Function P gives the perimeter of an equilateral triangle of side length s. Find P(s)

Imagine a situation where a person is using a garden hose to fill a child's pool. Think of two quantities that are related in this situation and that can be seen as a function. a. Define the function using a statement of the form “______ is a function of ______.” Be sure to consider the units of measurement.

Function C gives the cost, in dollars, of buying n apples. Which statement best represents the meaning of C(10) = 9?

• The cost of buying 9 apples

• The cost of 9 apples is $10.

• The cost of 10 apples

• Ten apples cost $9.