locus help?

hannaboox3

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Joined
Sep 4, 2010
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how would I go about finding the locus of all points equidistant from the point F(-6,3) and the line y=-5?
i'm not sure what to do :(
 
Do you know what this describes?. A parabola.

The definition of a parabola is a set of points equidistant from a line and a given point not on the line.

So, we have the point (-6,3) and the line y=-5

y=-5 is the directrix and (-6,3) is the focus of the parabola.

It has equation \(\displaystyle (x-h)^{2}=4p(y-k)\)

where (h,k) is the coordinates of the vertex.

In this case (h,k)=(-6,-1)

p is the distance from the directrix to the vertex or from the focus to the vertex. See what p equals?.

Can you finish now by finding the equation of the parabola. Here is the graph of your parabola:
 
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