Mariah's house sits on an irregular lot with a triangular-shaped backyard. most of the backyard will be grass, but mariah would also like a rectangular garden plot. before she heads to the garden center, she needs to calculate a few measurements. how many square yards is the garden plot?

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,