Agym membership at one gym costs $10 every month plus a onetime membership fee of $15, and a gym membership at another gym cost $4every month plus a onetime $40 membership fee. after about how many months will the gym memberships cost the same amount

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,