Answer:
y=x^2-4x+12
Step-by-step explanation:
Vertex to standard form is simple once you know how to look at it.
Standard form is x^2+bx+c=y.
Vertex form is f(x) = a(x – h)2 + k
So we know h=-2 and k =8.
Then, you need to graph it.
Since the y intercept is 12, 12=c.
b=k/h so b=8/-2 or -4. So -4=b
