Question: what is the equation of a parabola?
Answer: You recognize the equation of a parabola as being y = x2 or. y = ax2 + bx + c from your study of quadratics. And, of course, these remain popular equation forms of a parabola. But, if we examine a parabola in relation to its focal point (focus) and directrix, we can determine more information about the parabola.