Mrs. Williamson asked each student what color car they drove. The results are recorded in the table below. What is the central angel of the sector that represents the black cars.

White: 19
Red: 28
Silver: 7
Blue: 9
Black: 18
Other: 9

Question

Mrs. Williamson asked each student what color car they drove. The results are recorded in the table below. What is the central angel of the sector that represents the black cars.

White: 19
Red: 28
Silver: 7
Blue: 9
Black: 18
Other: 9

anonymous · Answer

We use the fact that there are 360 degrees in a circle., and that a total of 90 cars are present in our data to find the central angle

anonymous · Answer

Now, let find the percentage of black cars, 18/90=.2, so in percentage the black cars make of 20 % of the pie chart.

anonymous · Answer

Now we can simply:|dw:1323443937490:dw|