Suppose that 13 inches of wire costs 78 cents. At the same rate, how many inches of wire can be bought for 36 cents?
Pls help!!

I believe that the answer is 6 inches

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,