A histogram titled Masses of apples, with five white bars for bins of 20 g from 100 to 200 g, and a frequency polygon drawn over them through the middle of the top of each bar. The polygon is closed down to the horizontal axis half a bin past each end, at 90 and 210 g. The vertical axis is titled Frequency and numbered from 0 to 16 by 2, and the horizontal axis, titled Mass (g), has a zig-zag break before 100.
