### Home > CC3 > Chapter 7 > Lesson 7.1.1 > Problem7-8

7-8.

7-8. A group of classmates surveyed how other students travel to school. The results of the survey are shown in the table at right. Make a circle graph showing the results of the survey using percents. Homework Help ✎

Find the students using each mode of transportation as a percentage of all the students.

Each category of data is then represented by a portion of the circle. The measure of the angle of each sector portion is directly proportional to the corresponding percentage.

Consider the bike riders.

$\frac{30}{240}=0.125\: \text{of\:the\:student}$

$\text{population\: ride\: bikes\: to\: school.}$

Proportionately as an angle, this would be 12.5% of 360° (a whole circle). This equates to 0.125(360°) = 45°.