SOLUTION: # 7 sketch graph of the function. label coordinates of vertex. lesson 9.4. y=-x^2+2x-3

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Question 119108: # 7 sketch graph of the function. label coordinates of vertex. lesson 9.4.
y=-x^2+2x-3
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
y=-x^2+2x-3
Use the formula for the x-value of the vertex: %28-b%2F2a%29
%28-2%2F%282%2A-1%29%29
x=1
.
Plug (x=1) back into the original equation and solve for the y-value:
y=-x^2+2x-3
y=-(1)^2+2(1)-3
y=-2
Vertex=(1, -2)