Question

A supermarket display consists of boxes of cereal. The bottom row has 23 boxes. Each row has three fewer boxes than the row below it. The display has six rows. (a) Write and use a function to determine how many boxes are in the top row. Show your work. (a) Use the appropriate formula to determine the number of boxes in the entire display. Show your work.

Answer 1

A.
Well, since we know the first row has 23, that is the y-intercept, and the slope is -3 because you go up by -3. Since you're trying to get to the sixth row, the equation is
y=-3(6)+23

B. Well, since we know the first row has 23, that is the y-intercept, and the slope is -3 because you go up by -3, then the equation would be
y=-3x+23