Unit 11: Circle graphs review

1. The 28 students in Mr. Pennington’s class voted which flavor of ice cream they liked.  Each student voted for one flavor.  The circle graph below compares the number of votes each flavor received.

How many students voted for chocolate?

• 50

• 50%

• 14

• 10

Answer explanation

50% of the students vote for chocolate; 50% of 28 is 14. Half of 28 is 14.

1. The 28 students in Mr. Pennington’s class voted which flavor of ice cream they liked.  Each student voted for one flavor.  The circle graph below compares the number of votes each flavor received.

How many students voted for vanilla?

• 25%

• 5

• 7

• 25

Answer explanation

One-fourth of the circle graph is vanilla. One-fourth is a fraction; the decimal equivalent of 1/4 is .25; to change a decimal to a percent you move the decimal two places to the right to get 25%. In DESMOS, you can type in 25% of 28 and it will give you 7. Or you can take half of 28 which is 14 and find half of 14 to get 7 as the quarter.

1. The 28 students in Mr. Pennington’s class voted which flavor of ice cream they liked.  Each student voted for one flavor.  The circle graph below compares the number of votes each flavor received.

How many students voted for strawberry?

• 15%

• 7

• 25%

• 10

1. Mrs. Jordan surveyed her students about their favorite class trip.  She displayed the results in the circle graph.

About what percent of Mrs. Jordan’s students chose the planetarium as their favorite class trip?

• 10%

• 15%

• 25%

• 50%

• 75%

• blue

• green

• purple

• red

Identify two car colors that most likely represent a combined total of 25 cars.

• purple and green

• green and red

• red and blue

• blue and green

What fraction of the students best represents those who rated the show as "above average"?

• 3/4 or 75%

• 1/5 or 20%

• 1/3 or 33.333%

• 2/3 or 66.666%

Which bar graph could represent the same data?

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Which of these represents the data shown in the circle graph?

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