Topic 10 Lesson 2-4

Pg 401: Opener #1 Shawna earns $10 each week helping her grandmother. She decides to save her money in the bank. Complete the table representing the data from Shawna’s situation. Then indicate the first differences for “Time in weeks” and “Amount saved.”

How much did she have saved after 6 weeks?

• $10

• $30

• $50

• $60

Pg 401: Core #2 On your graph, draw slope triangles to show the changes in y-values and x-values as you move from one week to the next. Use the ratio to calculate the slope for these data.

• 10

• 30

• 5

• 1

Pg 401: Core #3 How does the slope of the line connect to the rate of change in the data?

• They're different by 2

• They're cousins

• They're the same

• They're different by 4

Pg 401: Core #4 Look at your graph. How much money was saved at Week 0?

• $0

• $10

• $50

• $60

• $70

Pg 401: Core #4 Look at your graph. How much money was saved at Week 7?

• $0

• $10

• $50

• $60

• $70

Pg 402 Core 6. Using the slope formula, calculate the rate of change using the points for:

a. Week 1 and Week 4

• 0

• 10

• 50

• 60

• 70

Pg 402 Core 6. Using the slope formula, calculate the rate of change using the points for:

b. Week 2 and Week 6

• 0

• 10

• 50

• 60

• 70

Pg 402 Core 6. Using the slope formula, calculate the rate of change using the points for:

c. Is this statement a true statement? Justify your answer.

• True

• False

Pg 403 Core 10. Use the table and graph Manuel created to answer the questions.

a. Describe what is happening to the amount of money in Manuel’s savings account.

• It's increasing by $10 a week

• It's increasing by $50 a week

• It's decreasing by $10 a week

• It's decreasing by $50 a week

Pg 403 Core 10. Use the table and graph Manuel created to answer the questions.

b. What is the rate of change for the situation?

• 10

• -50

• -10

• 50