SOLUTION: The line of symmetry of the parabola whose equation is y = ax^2 - 4x + 3 is x = -2. What is the value of "a"? A.) -2 B.) -1 C.) -1/2

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Question 1073619: The line of symmetry of the parabola whose equation is y = ax^2 - 4x + 3 is x = -2. What is the value of "a"?
A.) -2
B.) -1
C.) -1/2
Found 2 solutions by ikleyn, stanbon:
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
-1. Option B).



Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The line of symmetry of the parabola whose equation is y = ax^2 - 4x + 3 is x = -2. What is the value of "a"?
Line of symmetry occurs where x = -b/(2a)
Solve for "a":: -b/2a = 4/(2a) = -2
-4a = 4
a = -1
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Cheers,
Stan H.
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A.) -2
B.) -1
C.) -1/2