1. ## Parabola/Vertex Concern...

I need to find b and c so that the parabola y = -18 x^2 + b x + c has vertex (1 , -7 ).

very confusing..

2. Originally Posted by frozenflames
I need to find b and c so that the parabola y = -18 x^2 + b x + c has vertex (1 , -7 ).

very confusing..
vertex is at $x = -\frac{b}{2a}$

$1 = \frac{b}{36}$

$b = 36$

... now use the coordinates again in the original equation and solve for $c$