SOLUTION: after i find the focus,directrix, aixis of symmetry, vertex and everything else how do i graph the parabola?

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Question 71804This question is from textbook algebra 2
: after i find the focus,directrix, aixis of symmetry, vertex and everything else how do i graph the parabola? This question is from textbook algebra 2

Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
after i find the focus,directrix, aixis of symmetry, vertex and 
everything else how do i graph the parabola?

Suppose you have the focus, vertex, and directrix:


        .F       

        .V         
                  
 _______________ 
   directrix

1. Draw a line segment from the focus F through the vertex V to the 
directrix.
        
           .F         
           | 
           |        
           .V
           |        
 __________|__________ 
   directrix

2. Draw two adjacent squares which have that seqment as a common side.

P__________.F_________Q
|          |          |
|          |          |
|          .V         |
|          |          |
|__________|__________|
   directrix

Draw the parabola through the vertex V and the points marked P and Q. 
  
Edwin