Oct 06, 2020 · Any point on the parabola is equidistant from a fixed point (the focus) and a fixed straight line (the directrix). In order to graph a parabola, you need to find its vertex as well as several points on either side of the vertex in order to mark the path that the points travel.

The general equation of a straight line is: y = m x + c. y = mx + c y = mx+ c. Where m is the slope (gradient) of the line and c is the y -intercept. To obtain the gradient, find two points upon the line. For the sake of this example, let's assume that the two points are (1,3) and (0,1).