The graph below is used by company 2 to show the average monthly electric cost based on the electricity provider.
how could the graph be redrawn so that the difference in monthly electric cost does not appear as great?
a)the scale on the y-axis could be changed to 0–150.
b)the scale on the y-axis could be changed to 100–120.
c)the interval on the y-axis could be changed to count by 1s.
d)the interval on the y-axis could be changed to count by 20s.

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.'