The diagram below shows 5 identical bowls stacked one inside the other. the height of 1 bowl is 2 inches. the height of 5 bowls is 5 inches.

part a: write an equation using x and y to find the height of a stack of bowls based on any number of bowls.

part b: describe what the x and y variable represent.

part c: use the equation from part a to find the number of bowls if the height of the stacked bowls is 12.5 inches.