1. john began his job making $25 the first day. after that he was paid $6.75 per hour. the equation is y = 6.75x + 25. use x-values: 0, 20, and 40.

2. a membership to movie night movie club costs $10, plus $2 per movie. the equation is y = 2x +10. use x-values: 0, 5, and 10.

3. you are using 0.05 gallons per mile of a suv gas tank that holds 16 gallons. the equation is . alternatively, you may use . they are the same equation. use x-values: 0, 160, and 320.

4. the temperature was 56 degrees this morning, but dropped one degree per hour through the rest of the day. the equation is . you may use . they are the same equation. use x-values: 0, 5, and 10.

5. your weight-lifting class cost you a $20 fee up front, and $5.50 per class. the equation is y = 5.50x + 20. use x-values: 0, 10, and 20.