Question

the aquarium manager would like to see a direct comparison of the amount of each kind of food perky and pegasus eat daily. which graphic makes it easiest to compare the exact quantities?

a. pie charts for perky and pegasus with key: bc, sq, sc, cr, sh

b. bar graph titled daily feedings with categories bc, sq, sc, cr, sh, key: perky (blue), pegasus (white)

c. graph titled daily feedings with key: perky (blue line), pegasus (dashed line)

Explanation:

Step1: Analyze Graph A (Pie Charts)

Pie charts show proportions, not exact quantities easily. Comparing exact amounts between two pie charts is hard as we need to estimate slice sizes.

Step2: Analyze Graph B (Bar Graph)

Bar graphs use lengths of bars to represent quantities. For each food type (BC, SQ, SC, CR, SH), we have two bars (Perky and Pegasus) with clear heights. We can directly compare the heights (and thus quantities) by looking at the y - axis scale.

Step3: Analyze Graph C (Line Graph)

Line graphs are better for showing trends over time or continuous data. Here we are comparing discrete quantities of different food types, so line graph is not suitable.

Answer:

B. Daily Feedings (the bar graph)