Five-Minute Check (over Lesson 9–7)Main IdeaExample 1:Use a Graph

• Solve problems by using a graph.

Use a Graph

The graph shows how many boxes of cookies were sold by five students for a school fundraiser. How many boxes did the students sell altogether?Understand The graph shows

you how many boxes were sold by each of five students. You want to know the total number of boxes sold by the students.

Use a Graph

Check Look at the numbers at the top of each bar. Double check your sum.

Answer: The students sold 115 boxes altogether.

Plan Use the graph to add the numbers of boxes sold.

Solve 30 + 10 + 15 + 35 + 25 = 115

1. A2. B3. C4. D0% 0%0%0%A. 28 dogs B. 30 dogs

C. 31 dogs D. 34 dogs

The graph shows how many dogs Edmond walked each day this week. How many dogs did he walk altogether during the week?

End of the Lesson

Five-Minute Check (over Lesson 9–7)

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Math Tools

Slope and Intercept

1. A2. B3. C4. D0% 0%0%0%

(over Lesson 9-7)

Last year, Justin and his sister, Karin, earned a total of $468 in allowance. If Justin earned $52 more than Karin in allowance, write a system of equations that represents their allowances.

A. j + k = 468; j = 52 + k

B. j + k = 468; j = 52 – k

C. j + k = 468; j = 52 ÷ k

D. j – k = 468; j = 52 + k

1. A2. B3. C4. D

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(over Lesson 9-7)

Mrs. Kung wants to take two classes at the localrecreation center. She wants to spend no more than$40 per class this month. The aerobics class costsan initial fee plus $3 per class. The pottery classcosts an initial fee plus $5 per class. Write a systemof inequalities to represent what Mrs. Kung willspend this month for the two classes.

A. 3y + x < 40; 5x + y < 40B. 3x + y > 40; 5x + y > 40C. 3x – y ≥ 40; 5x – y ≤ 40D. 3x + y ≤ 40; 5x + y ≤ 40

1. A2. B3. C4. D

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(over Lesson 9-7)

The sum of Dewan’s age plus three times Adrianne’s age is 32. The difference of Dewan’s age minus Adrianne’s age is 4. Which system can be used to find Dewan’s age and Adrianne’s age?A. d + 3a = 32; 3d – a = 4

B. 3d + a = 32; a – d = 4

C. d + 3a = 32; d – a = 4

D. d + 3 + a = 32; d – a = 4