posted by McKenna Louise on .
1. The area of a square varies directly as the square of its side. If the side is halved, what would be the effect on its area?
2. If y varies directly as the square of x, what will happen to y when x is tripled?
a = ks^2
new area: k(s/2)^2 = ks^2/4 = a/4
k(3x)^2 = 9kx^2 = 9y