Given the focus and directrix write the equation of a parabola

The video tutorial addresses a graphing problem, focusing on determining the equation of a parabola. The teacher guides students through identifying the focus, directrix, and vertex, and calculating the P value. The graph's direction is determined, and the equation is finalized using the known values of H, K, and P. The tutorial emphasizes understanding the relationship between the focus, directrix, and vertex to correctly plot and write the equation.

What does it mean for a graph to open towards the focus?

What are the general formulas you need to memorize for graphing?