WORTH 35 POINTS PLEASE HELP (05.01 MC)

The graph shows the prices of different numbers of bushels of corn at a store in the current year.

The table shows the prices of different numbers of bushels of corn at the same store in the previous year.

Part A:
Describe in words how you can find the rate of change of a bushel of corn in the current year, AND find the value. (2.5 points)

Describe in words how you can find the rate of change of a bushel of corn in the previous year, AND find the value. (2.5 points)

Part B:
How many dollars more is the price of a bushel of corn in the current year than the price of a bushel of corn in the previous year? Show ALL your work!