Edge Length, x Surface Area, y 1 6 2 24 3 54 4 96 A graph of a curve on a coordinate plane that goes up and to the right with edge length in units on the x axis and surface area in square units on the y axis. The curve begins at the origin and passes through the points 1 comma 6 and 2 comma 24 and looks like the right half of a U. Yes, the relationship between x and y is a linear function. No, the relationship between x and y is not a function. The relationship between x and y is not a relation. Yes, the relationship between x and y is a non-linear function.