CPM Homework Help : GB8I Problem 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.

Mode of Transportation	Number of Students
Bus	$90$
Ride Bike	$30$
Ride in Car	$75$
Walk	$45$

Hint:

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

More Help 1:

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.

More Help 2:

Consider the bike riders.

$\frac{30}{240}=0.125$ of the student population ride bikes to school.

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

Answer:

A circle graph with 4 sections labeled as follows: Ride in Car, 31.25 percent, Walk, 18.75 percent, Ride Bike, 12.5 percent, and Bus, 37.5 percent.