2
For example, the parabola y 2 = x 3 opens to the right, like a "C" Advertisement 3 Find the axis of symmetry Remember that the axis of symmetry is the straight line that passes through the turning point (vertex) of the parabola In the case of a vertical parabola (opening up or down), the axis is the same as the x coordinate of the vertexThe focus of a parabola can be found by adding to the ycoordinate if the parabola opens up or down Substitute the known values of , , and into the formula and simplify Find the axis of symmetry by finding the line that passes through the vertex and the focus