SOLUTION: Write the equation of a quadratic function that is concave down and has a vertex at the point (4, -2). The parabola is not stretched at all. (Don't I need another point?? - He

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Question 948036: Write the equation of a quadratic function that is concave down and has a vertex at the point (4, -2). The parabola is not stretched at all.
(Don't I need another point?? - He didn't give us one)
Found 2 solutions by Fombitz, MathTherapy:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
No, I'm assuming that by "not stretched", he meant the coefficient in front of the quadratic term is or else you would need more information.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!
Write the equation of a quadratic function that is concave down and has a vertex at the point (4, -2). The parabola is not stretched at all.
(Don't I need another point?? - He didn't give us one)
Vertex form of the equation of a parabola: 

Since the parabola was NOT STRETCHED, and is concave down, then 

With vertex being (4, - 2), and a being - 1,  becomes: 

__________ 

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