1. How many tennis shoes were sold in 2009?

2. In which year were about million tennis shoes sold?

3. Is a function of ? Explain why or why not.

Year (𝑥)

2005 2006 2007 2008 2009 2010

Number of tennis shoes in millions

(𝑦) 3.3 15.3 48.4 89 128 148.2

agenda

• 1) go over lesson 1• 2) problem set• 3) review• 4) exit ticket

The monthly cost of a gym could be described as a function of the number of visits. If the cost of the exercise plan is linear or nonlinear function? Explain.

• 8 visits: $125/month• 10 visits: $135/month• 12 visits: $155/month• 21 visits: $220/month

Randy began completing the table below to represent a particular linear function. Write an equation to represent the function he used, and complete the table for him.

Input

(𝑥) −6 −3 0 3 6 9

Output (𝑦)

−4 2 11

Create the graph of the function in problem 5.

The money paid for extended parking each day at Polly’s Parking World is shown in the graph below

A new parking garage, Stacy’s Stay and Park just opened. The information is organized in the table below.

If you only have to park for 5 days, which garage would you use. Explain.

Number of days 0 2 4 6 Dollars saved $5.00 $7.50 $10.00 $12.50

Another garage Flynn’s Fabulous opens, and they charge an admission fee of with no additional fee per day. At what number of days does it become more expensive to go to Polly’s parking world? At what number of days does it become more expensive to go to Stacy’s Stay and Park then Flynn’s Fabulous?

For all three garages, the cost is a function of the number of days. Compare the functions for all three garages in terms of their rate of change. Describe the impact it has on the total cost of parking in each garage.