Before you draw any bar, rule a line right across at every number.

Then draw one bar for each name, up to its number.

Step 4: a line right across at every number, and no bars yet.

The ocean's number is 97. 97 does not sit on a line: it sits just under the 100 line.

So Rhea draws the ocean bar up to just under the 100 line.

The ocean bar, up to just under the 100 line.

The ice caps' number is 2, so the ice caps bar is a short bar just above the bottom line.

The underground number is 1, so the underground bar is shorter still.

Lakes and rivers hold less than 1 square each.

A bar that short cannot be drawn, so Rhea writes 'less than 1' over each name instead.

The finished graph: one bar for each place, and 'less than 1' over lakes and over rivers.