Name_______________________________________ Block______________ TWMM: 2.1 – Linear Models (found on pages 24 – 26) Problem 2.1 A 1. 2. a) b) 3. a) b)

Problem 2.1 B 1.

2. y-intercept (starting value): slope (rise/run): equation: 3. 4.

Getting Ready for Problem 2.2 1. You can find car wash places all around our nation. Suppose you owned a self-service car wash. What costs do you need to consider when deciding how much to charge customers? 2. Turn to the bottom half of page 27 in your math book. Read the descriptions for the three different car wash companies and match each company with the appropriate equation below. Sudzo Wash and Wax c = 75t p = 10t Pat’s Power Wash c = 49 + 2t c = 0.75t U-Wash-It p = 10 – 60t c = 2 + 0.49t p = 10 – 0.60t 3. Explain what the numbers and variables mean in each chosen equation. 4. What questions can your equations help you answer?

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Problem 2.2 (pages 28-29) A1. B. 2. 3. C1. D. 2. 3. E. F1. 2. 3.

Getting Ready for Problem 2.3 Have you ever paddled a canoe or pedaled a paddle boat? (say that 10 times fast). You can rent canoes and paddleboats (and many other things) on numerous lakes around Minnesota. In Minneapolis, Lake Harriet, Lake Calhoun and Lake Nokomis rent canoes for $16 an hour (about $0.27 per minute) and paddleboats for $17 an hour (about $0.28 per minute). Sandy’s Boat House (problem 2.3 in our book) rents canoes according to this equation: c = 0.15t + 2.50, where c is the charge in dollars and t is the time in minutes. Which place would be cheaper to rent a canoe from, one of the lakes or Sandy’s Boat House? Explain. Turn to page 30 in your math book and answer the “Getting Ready…” questions and then work on Problem 2.3. Problem 2.3 (pages 30-31) A.

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B. Answer question B and complete the table below.

C. D1. D2. E1. E2. E3.

Time (minutes) 0 10 20 30 40 50

Charge ($)