is range the x or y
Domain = x axis, so its whatever number your parabola can be on the x-axis...ex. y=x^2 D={xER} which is x = any real number. Range = y axis..so its whatever number your parabola can be on the y axis..ex y=x^2 R={yER/y=>0} which is y = any real number such that y is greater than/equal to 0... hope that this helps..