How could the graph be redrawn so that the difference in monthly electric cost does not appear as great?

To make the difference between monthly electric costs look smaller, use a wider y-axis scale that starts at zero. A scale from 0 to 150 gives the differences less visual emphasis than a narrow scale such as 100 to 120, which would make them look larger. So the graph could be redrawn with a y-axis scale of 0–150.

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