Greg bought 5 new sweatshirts at one store for a total of $63. His younger brother Zachary bought 4 sweatshirts at a different store and paid $54. a. Explain the meaning of unit rate, and give the unit rate for each boy.
b. Which is the better buy?

its c i just did it

Step-by-step explanation:

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).