Decide whether or not each equation represents a proportional relationship. type yes or no. hint: look at the equation. volume measured in cups (c) vs. the same volume measured in ounces (z): c = 1/8z area of a square (a) vs. the side length of the square (s): a = slatex: ^22 perimeter of an equilateral triangle (p) vs. the side length of the triangle (s): 3s = p length (l) vs. width (w) for a rectangle whose area is 60 square units: l = 60/w