Question

The graph below is used by company 2 to show the average monthly electric cost based on the electricity provider.

Answer 1

Given the bar graph above, the difference in monthly electric cost appear to be great because of the choice of scale.

In scaling, the narrower the intervals of the axis, the larger the graph and the more highlighted the relative difference between the components of the graph.

Conversely, the wider the the intervals of the axis, the smaller the graph and the less highlighted the relative difference between the components of the graph.

Therefore, to make the difference in monthly electric cost appear not to be as great, we widden the intervals on the y-axis.
i.e. 'The interval on the y-axis could be changed to count by 20s.'

Answer 2

The answer is A) The scale on the y-axis could be changed to 0–150.

Because the y-axis starts at 95, it makes it seem like the change is huge but it's not actually.