1. Question 1
Sketch a graph to represent the situation. The level of water in a river rose rapidly during the storm and then gradually decreased back to the original level.

2. Question 2
Sketch a graph to represent the situation. The volume of a ball increased as more air was added.

3. Question 3
Determine the equation of the function. a. b. -

4. Question 4 Write a rule that represents the function.
(0, 5), (1, 6), (2, 7), (3, 8), (4, 9)
(0, 0), (1, –2), (2, –4), (3, –6), (4, –8)

5. Question 5 Write a rule that represents the function.
(0, 1), (1, 2), (2, 4), (3, 8), (4, 16)
(0, 2), (1, 5), (2, 8), (3, 11), (4, 14)

6. Question 6
Is the point ( 7 2 , 3 2 ) on the graph of 6x – 2y = 18? How do you know?

7. Question 7
Sketch a graph to represent the situation. The price of gasoline has steadily increased over the last 10 years.

8. Question 8
Sketch a graph to represent the situation. The temperature increased from 9 a.m. to 2 p.m. and then decreased from 2 p.m. to 5:00 p.m.

9. Question 9
Determine whether the relationship is a function. a. b.

10. Question 10 Write a rule that represents the function.
(0, 2), (1, 4), (2, 6), (3, 8), (4, 10)
(0, 1), (1, 3), (2, 9), (3, 27), (4, 81)

11. Question 11
In a relationship between variables, what is the variable called that changes in response to another variable?

12. Question 12
A lawn care company charges a $10 trip fee plus $0.15 per square foot of x square feet of lawn for fertilization. What is the equation that represents the relationship?

13. Answers

14. Answers 3a. y = 4x b. y = x + 3 4a. y = x + 5 b. y = -2x
6. Yes 7. 8.
9. Yes
10. a. y = 2x b. y = 3x
11. Dependent
12. y = 0.15x + 10