Parabola equation of Opens left or right, vertex: (7, 6); passes through (−11,9)

The equation of a sidways parabola is

 

\((y-k)^2=4a(x-h)\qquad \text{where the vertex is (h,k)}\)

 

Sub in h,k

then sub in the point on the parabola, to solve for a

 

You try now.