Question 767882
What is the equation of a parabola with vertex (0, 0) and directrix x = -3.
Given data shows a that opens rightward.
Its basic equation: 
y^2=4px
vertex:(0,0)
axis of symmetry: y=0 or x-axis
p=3 (distance from directrix to vertex on the axis of symmetry)
4p=12
equation of given parabola: y^2=12x