1. Warmup Problems for 11/27 1) Which of the following scenarios does NOT represent direct variation? A.The price of 3 pencils is $0.20 and the price of 9 pencils is $0.60. B.Mary earns $4 for 1 hour of tutoring and $16 for 4 hours of tutoring. C.A class with 1 teacher has 15 students and a class with 2 teachers has 24 students. D.A fountain being filled has 12,000 gallons of water after 4 hours and 18,000 gallons after 6 hours. 2)

2. Answers for pg. 140 #4-13, 23, 32a

3. 3.8: Inverse Variation

4. Inverse Variation Two quantities are said to vary inversely if, when one increases, the other decreases, and vice versa. For example, the amount of time it takes to paint a room varies inversely with the number of painters: Number of painters 12345 Hours Required 2412864:48

5. Other Examples Help me fill in the blanks: _____ varies inversely with _____. 1.Hours driven … speed. 2. 3. 4. 5.

6. Practice Which table shows an inverse relationship between speed and time?

7. Practice Which table shows an inverse relationship between r and s?

8. Homework Graph the data on the coordinate planes provided. Staple the coordinate planes to your paper.