A parabola has its vertex at (0,0)(0,0)(0,0) and passes through (1,4)(1, 4)(1,4). What is its equation?
y=2x2y = 2x^2y=2x2
y=4x2y = 4x^2y=4x2
y=x2y = x^2y=x2
x=4y2x = 4y^2x=4y2