Find the vertex axis of symmetry xintercepts and yintercept
Find the vertex, axis of symmetry, x-intercepts, and y-intercept of the parabola that has the given focus (-3/2,0) and the directrix
y=1/2. Sketch the graph.
Solution
focus(-3/2,0)=(h,k+1/4a)
h=-3/2
k+1/4a=0
directix,y=1/2
k-1/4a=1/2
k=1/4
1/4+1/4a=0
a=-1
y=-(x+3/2)^2 +(1/4)
vertex=(-3/2,1/4)
y intercept
y=(3/2)^2+1/45/2
axis of symmetry
x+3/2=0
x=-3/2
