In the form f(x)=a(x-h)^2+k
vertex is (h,k)se see vertex is (1,-4)y=a(x-1)^2-4find aanother point is (4,-2)-2=a(4-1)^2-4-2=a(3)^2-4-2=9a-4add 42=9adivide b 92/9=a\(f(x)= \frac{2}{9}(x-1)^2-4\)
