Question

Review my example on how to find the rate of change for a given set of data. Let (x, y) = (11, 12) and (x', y') = (15, 16). The formula to find the rate of change for the two order pairs is: (y' - y) / (x' - x) = rate of change, so (16 - 12) / (15 - 11) = 4/4 = 1, therefore, the rate of change is 1 *

Answer 1

I would have labeled the points as

(x1,y1) = (11,12)

(x2,y2) = (15,16)

then used the formula

m = (y2-y1)/(x2-x1)

However, your idea works as well. I don't see any errors with your steps. Nice work.