Which graph represents y = RootIndex 3 StartRoot x EndRoot? On a coordinate plane, a parabola with a vertex at (0, 0) opens up. On a coordinate plane, a curve that begins at (0, 0) opens down and to the right in quadrant 1. On a coordinate plane, a cubic function is vertical and goes through (0, 0). On a coordinate plane, a cubic function is horizontal and goes through (0, 0).