1. 1. {(-2, 3), (-1, 2), (0, 2), (-2, 9)} a. Is it a function? Explain. b. What is the domain? c. What is the range? 2. Bowling costs $4.50 per game. Shoe rental costs $3.75. Write a function that models the total cost of games and shoe rental. Evaluate the function for 10 games.

2. 1. {(-2, 3), (-1, 2), (0, 2), (-2, 9)} a. Is not a function. When x =-2, there are TWO y values. b. Domain: {-2, -1, 0} c. Range: {2, 3, 9}

4. Tues 9/22 Lesson 2 – 2 Learning Objective: To write & interpret direction variation eq’ns Hw: Pg. 71 #7, 9, 19 – 25 odd, 39 – 45 odd, CC*51, 52, 71

5. Algebra II

6.  To write & interpret direct variation equations

13. 5. Write a direct variation equation that passes through (3, -15) y = kx -15 = k(3) 3 3 -5 = k y = -5x

17. Algebra II

20. CANNOT DIVIDE BY ZERO!!

21. When slope is undefined, the graph is a vertical line. Parallel line would also be vertical with a slope that is undefined. Perpendicular line would be horizontal with a slope that is 0.

22. When slope is 0, the graph is a horizontal line. Parallel line would also be horizontal with a slope of 0. Perpendicular line would be vertical with a slope that is undefined.

23.  Explain why you cannot answer the following question. If y = 0 when x = 0, what is x when y = 13?