7th Grade Math

488 Statistical Displays

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SCAVENGER HUNT The bar graph below

shows the number of items each student

obtained from a scavenger hunt.

Scavenger Hunt

Ty Jill Gui Rihanna Karl

Student

16

14

12

10

8

6

4

2

Number of Items Obtained^0

1. Who obtained the most items?


2. Who obtained the least items?

EXAMPLE 1

SPORTS Which player(s) average more

than 10 points per game?

Points Per Game

Nick Walter Jai Marreese Dan

Players

18

16

14

12

10

8

6

4

2

Average Number of Points^0

Nick, Walter, and Marreese averaged

more than 10 points per game.

3. TESTS The table shows the results of
   Mr. Horowitz’s first period science
   class test scores.
   Science Test Scores
   91 86 72 90 81
   88 79 93 66 83
   77 92 70 80 83
   75 82 73 98 84

What percent of students received

a score of at least 90 on the science

test?

EXAMPLE 2

SOCIAL NETWORKING Use the circle

graph. If 300 people were surveyed,

how many people have two accounts?






PS

NPSF

 







Number of Accounts

Find 61% of 300.

61% of 300 = 61% × 300

= 0.61 × 300 or 183

So, 183 people have two accounts.

486_489_C09_CO_895130.indd 488 1/11/10 9:29 AM