This Week we looked at Parabolas. Parabolas are U shapes on a graph.
To find a parabola you use: (x-h)^2=4c(y-k)
vertex: (h, k)
focus: (h, k+c)
directrix=y=k-c
axis of symmetry: x=h
The focus is a point above the vertex of the equation and it is always the C away from the vertex.
The directrix is below the vertex and it is a line that runs parallel to the vertex and is C away from the vertex.
The above equation is for a vertical equation.
A Horizontal equation would use:
(y-k)^2 =4c(x-h)
vertex= (h,k)
focus: (h+c, k)
directrix: (x=h-c
axis of symmetry: y=k
Below is an example problem on the parabola.
This is how you solve parabolas and graph them
No comments:
Post a Comment