Ever since Damon was a small child, his favorite food has always been carrots. He likes them so much he wants to plant a garden in his backyard just to grow carrots.
There is a proportional relationship between the size of Damon's garden (in square feet), x, and the number of carrots he can grow at a time, y.
x (square feet): 1, 2, 3, 4
y (carrots): 4, 8, 12, 16
Write an equation for the relationship between x and y. Simplify any fractions.