College Algebra
posted by Joyce .
Carl had packed 6 crates by 8 a.m. By 11 a.m., he had packed 24 crates. Find the average rate of change in crates packed from 8 a.m. to 11 a.m.

6 crates by 8 am
24 crates by 11 am
Aver rate of change = change in crates packed/change in time
Aver rate of change = (24  6)/(11  8)
Aver rate of change = 18/3 = 6 crates/hr