This means each friend is equivalent to 20° in the pie chart. Image caption, Multiply each frequency by 20 to calculate the angles required. Walk = 8 × 20 = 160. Cycle = 2 × 20 = 40.

No slice is drawn if the chart statistic for the midpoint is 0. order the slices by midpoint value in ascending order starting at the three o'clock position and proceeding counterclockwise around the ...

Playfair, who is said to have invented the pie chart, includes moments such as “Rome founded”, “Mahomet’s Flight”, and “America discovered”. He never mentions slavery. With such a ...