Test 2 Section 2 - #4 (page 453)

This question is basically asking what percent of the total car sales April represents. We know there were 30 cars sold in April (from the given graph), but how many cars were sold total? Using the graph, that would be 20+18+22+30+48+42, which equals 180. So April had 30 of the 180 cars, which is equal to 1/6. Since a circle graph has 360 degrees, 1/6 of that would be 60 degrees, and the answer is (C).