question_answer

Shoes of the following brands are sold in Nov. 2007 at a shoe store.

Construct a pie chart for the data.
A	130
B	120
C	90
D	40
E	20

Answer:

We find the central angle for each sector

Brand	Number of shoes	In fraction	central angle
A	130	\[\frac{130}{400}=\frac{13}{40}\]	\[\frac{13}{40}\times 360{}^\circ =117{}^\circ \]
B	120	\[\frac{120}{400}=\frac{3}{10}\]	\[\frac{3}{10}\times 360{}^\circ =108{}^\circ \]
C	90	\[\frac{90}{400}=\frac{9}{40}\]	\[\frac{9}{40}\times 360{}^\circ =81{}^\circ \]
D	40	\[\frac{40}{400}=\frac{1}{10}\]	\[\frac{1}{10}\times 360{}^\circ =36{}^\circ \]
E	20	\[\frac{20}{400}=\frac{1}{20}\]	\[\frac{1}{20}\times 360{}^\circ =18{}^\circ \]

The pie chart is