Monday, 9 June 2014

Write the standard form of the equation of the parabola with the given focus and vertex at (0,0)

A parabola opens toward to the location of focus with respect to the vertex.


When the vertex and focus has same y-values, it implies that the parabola opens sideways (left or right)


When the vertex and focus has same x-values, it implies that the parabola may opens upward or downward


The given focus of the parabola is located above the vertex . Both points has the same value...

A parabola opens toward to the location of focus with respect to the vertex.


When the vertex and focus has same y-values, it implies that the parabola opens sideways (left or right)


When the vertex and focus has same x-values, it implies that the parabola may opens upward or downward


The given focus of the parabola is located above the vertex . Both points has the same value of .


Thus, the parabola opens upward. In this case, we follow the standard formula:  . We consider the following properties:


 vertex as


 focus as


  directrix as


 Note: is the distance of between focus and vertex or distance between directrix and vertex.


From the given vertex point , we determine h =0 and k=0.


From the given focus , we determine and .


Plug-in  on . we get:




Plug-in the values: , , and  on the standard formula, we get:



 as the standard form of the equation of the parabola with vertex and focus .

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