Practice 9 24 13

Prac%ce Problems 9.24.12 Example Problem Mr. Valdez’s lawn grows half an inch for every inch of rain that falls. 1.  What is the Independent Variable? Rain fall (inches)

2.  What is the Dependent Variable? Growth of Grass (inches)

3.  Determine the rate of change using a graph and showing the slope triangles.

4.  Determine the rate of change using the table.

5.  Is there an ini%al value? If so, what is the ini%al value? Y-‐intercept is (0,2), the ini9al value is 2 inches of growth.

6. How many inches of rain need to fall for the grass to grow to a length of 5.5 inches? Jus%fy

your answer.

x y

0 2

1 2.5

3 3.5

4 4

Prac%ce Problems 9.24.12 Prac%ce Problem #1 George drives 25 miles in one hour during rush hour traffic. 1.  What is the Independent Variable?

2.  What is the Dependent Variable?



5.  Is there an ini%al value? If so, what is the ini%al value?

6. How many hours does George drive to travel 225 miles? Jus%fy your answer.

x y

0 0

2 50

4 100

6 150

Prac%ce Problems 9.24.12 Prac%ce Problem #2 Alicia works 22 hours and earns $198. 1.  What is the Independent Variable?





6. How many hours does Alicia need to work to earn $171? Jus%fy your answer.

x y

12 108

15 135

18 162

25 225

Prac%ce Problems 9.24.12 Prac%ce Problem #3 A stone sinks 36 inches is 4 seconds. 1.  What is the Independent Variable?





6. How many seconds does the stone sink to reach a depth of 81 inches? Jus%fy your answer.

x y

0 0

2 18

3 27

6 54

Prac%ce Problems 9.24.12 Prac%ce Problem #4 The Sunset Cheerleaders earned $52 selling 8 cakes in the bake sale. 1.  What is the Independent Variable?





6. How many cakes do the cheerleaders need to sell to make $71.50? Jus%fy your answer.

x y

0 0

2 13

4 26

7 45.50

Demonstra%on of Learning 9.24.12 Veronica’s rose bush grew 12 inches in the last two years. 1.  What is the Independent Variable?





6. How old was the plant when it was 65 inches tall? Jus%fy your answer.

x y

0 23

2 35

5 53

8 71

Homework 9.24.12 Carmen read 2 books in 6 days. 1.  What is the Independent Variable?





6. How many books can Carmen read in 21 days? Jus%fy your answer.

x y

0 0

2 6

4 12

5 15

Practice 9 24 13

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Transcript of Practice 9 24 13