Trisha graphed the relationship between yards and feet, with yards along the x-axis and feet along the y-axis. the relationship is proportional. which statement is true about the point (x, y) on the graph? a) if x is 0, y must be the number of feet in a yard. b) if y is 0, x must be the number of feet in a yard. c) if x is 1, y must be the number of feet in a yard. d) if y is 1, x must be the number of feet in a yard.