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. Car = 5 × ...

Today, we update one of our favorite charts, which looks at how orders route ... and how orders are handed by brokers, means each pie actually works quite differently to the others.

With seemingly countless options available, choosing the right chart is challenging, and the wrong choice can influence how ...