The graph shows how many cups of food are in an automatic pet feeder after given numbers of days. which statement is correct?

a.
every3/4-day, the amount of food decreases by 1 cup.

b.
every day, the amount of food decreases by 4/3 cups.

c.
every 3 days, the amount of food decreases by 4 cups.

d.
every 4 days, the amount of food decreases by 3 cups.

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?