Question

A family is tracking its spending habits. Over the past year, the grocery bill has ranged from $120 to $180. Suppose you were going to plot these points on a coordinate grid.

(a) What is a good scale to use for the y-axis? Explain your reasoning.

(b) What is a good interval to use for the y-axis? Explain your reasoning

Answer 1

A vertical scale 0 to 200 with steps of 20 accommodates zero as base reference as well as 120 and 180 without falsely representing 180 as maximal.