A parabola is a set of all points (x,y) that are equidistant from a fixed line, and a fixed point on the line.
The formula for a vertical parabola is: (x-h)^2=4p(y-k) and the directrix: y=k-p
The formula for a horizontal parabola is: (y-k)^2=4p(x-h) and the directrix:'x=h-p
Make sure you keep your eye on all the variables and make sure you don't make any silly mistakes.
When doing parabolas it is easy to make a mistake because of the amount of variables. It is also important to use the right equation. Make sure to either use the horizontal or vertical equation. Thanks for posting a picture of how to use all the equations and which equation is needed if it's vertical or horizontal.
ReplyDeletethanks for showing me the difference between the vertical and the horizontal equation! the picture also helped a lot, the distinguishable colors help me remember the different facts about parabolas!
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