Question

Find the directrix of the parabola with the equation y+3=(1/10)[(x+2)^2]

Answer 1

well, 4p = 10 will help

Answer 2

?

Answer 3

the standard geometric equation for a parabola such as y=x^2, is of the form:

4py = x^2 ; there p is a distance that measures the difference from the vertex to the directrix, or the vertex to the focus

Answer 4

y = 1/10 x^2

10y = x^2

4p = 10 will help us define the distance we need to move from the vertex