Question

cost per doctor visit
how might the graph be redrawn to emphasize the difference between the cost per doctor visit for each of the three plans?
the scale on the y - axis could be changed to 0 - 100.
the scale on the y - axis could be changed to 25 - 40.
the interval of the y - axis could be changed to count by 20s.

Explanation:

Step1: Analyze y - axis scale effect

To emphasize differences in bar heights (costs), we need a y - axis scale that zooms in on the range of the costs. The current costs are around 30, 33, 37 (approx from the bar graph). A scale of 25 - 40 will focus on the region where the bars are, making the differences between them more visible. Changing to 0 - 100 will stretch the graph and make differences smaller. Counting by 20s or changing interval to count by 5s (the last two options) don't focus as well as 25 - 40.

Step2: Evaluate each option

• Option 1 (0 - 100): This broadens the scale, reducing the visual difference between bars.
• Option 2 (25 - 40): This narrows the scale to the range of the bar heights, emphasizing differences.
• Option 3 (count by 5s): Doesn't focus the scale on the relevant range as well as 25 - 40.
• Option 4 (count by 20s): Broadens the scale, reducing differences.

Answer:

The scale on the y - axis could be changed to 25–40.