Question 22 mary has scored 79 , 91 , 64 , 65 , and 71 on her previous five tests. what score does she need on her next test so that her average (mean is 77 ?

a

step-by-step explanation:

the answer is a

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,