. Which table of x- and y-values represents a proportional relationship? (1 point) x 1 2 3 4 y 4 8 9 10 x 1 2 3 4 y 5 6 7 8 x 2 4 6 8 y 1 2 3 4 x 1.5 2 2.5 3 y 3 6 9 12