A few days ago
Use the standard equation to answer to following problems and please show all your work.?
a)Find the equation for the parabola whose directrix x=5 and the focus at (-1,0).
b)Where is the vertex located?
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A few days ago
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standard parabola is one in which the focus is (a,0) and the directrix has equation x+a=0.
work out the equation of the curve from the definition: a parabola is the name of the curve of the set of points (x,y) in the cartesian plane that satisfy the condition of being equidistant from a fixed point and a fixed line.
The distance from the point (3,0) is (x-3)2 + y2
and the distance from the line x+5=0 is x+5
so the points of the curve are those that satisfy the equation
which is y2 = 16x + 16
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