7th Grade Math

EP26 Extra Practice

Extra Practice

Multi-Part Lesson 9-3 (continued)

PART E PAGES 526–531

Display each set of data in a stem-and-leaf plot.

1. 37, 44, 32, 53, 61, 59, 49, 69 2. 3, 26, 35, 8, 21, 24, 30, 39, 35, 5, 38


2. 15.7, 7.4, 0.6, 0.5, 15.3, 7.9, 7.3 4. 172, 198, 181, 182, 193, 171, 179, 186, 181


3. 55, 62, 81, 75, 71, 69, 74, 80, 67 6. 121, 142, 98, 106, 111, 125, 132, 109, 117, 126


4. 17, 54, 37, 86, 24, 69, 77, 92, 21 8. 7.3, 6.1, 8.9, 6.7, 8.2, 5.4, 9.3, 10.2, 5.9, 7.5, 8.3

BASKETBALL Use the stem-and-leaf plot shown. Points Scored

Stem Leaf

7

8

9

2 2 3 5 9

0 1 1 4 6 6 8 9

3 4 8

(^9) | 4 = 94 points

9. What is the greatest value?


10. In which interval do most of the values occur?


11. What is the median value?

Multi-Part Lesson 9-4: More Statistical Displays

PART A PAGES 532–533

1. BAMBOO The table shows the amount of growth of Bamboo Growth
   Time (yr) Height (in.)
   020
   130
   240
   350

bamboo in inches in a certain number of years.

a. Make a graph of the data.

b. If the trend continues, about how high will the bamboo

grow in 4 years?

2. WALKING The table shows how long it takes Lacey Walking
   Time (s) Distance (ft)
   00
   5 2.5
   10 5
   15 7.5
   20 10
   25 12.5
   30 15

to walk a given distance.

a. Make a graph of the data.

b. If the trend continues, predict how far Lacey will go in

50 seconds.

PART B PAGES 534–539

QUIZZES Refer to the graph which shows Rachel’s quiz

scores for six quizzes.

1. Describe the relationship between the two variables.

2

3

1

0

4

5

6

7

8

Score

Quiz

123456

Quiz Scores

2. Construct a line of best fit.


3. If the trend continues, predict Rachel’s score on the
   seventh quiz.


4. If the trend continues, predict Rachel’s score on the
   tenth quiz.

EP2_EP36_ExtPract_M1_895130.indd EP26 1/6/10 11:46 AM