https://gyazo.com/271c9c64771c2594f490011b38e301c0
Rate of change =
[ Profit in year 4 - Profit in year 2 ] / [ 4 - 2 ] =
[217.2 - 238.4 ] / 2 = - 10.6
Profits decreased by an average of $10,600 from year 2 to year 4
