please answer the question at the bottom of the picture, the top says Tanya is making homemade greeting cards, that data below represents the amount she spends in dollars y, in terms of the number she makes, x. please explain too, ty

answer: the common difference is -0.10

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,

a king of hearts and a 2 of spades