The point (h,k) in the vertex of a quadratic function is the highest point in the graph a

Question

The point (h,k) in the vertex of a quadratic function is the highest point in the graph a<0? true or false?

debbieg · Answer

is it "highest point in the graph IF a<0?"  Otherwise the question doesn't make much sense.

debbieg · Answer

The vertex is always EITHER the highest, or the lowest, point on the graph of a quadratic.

If the parabola opens UP then the vertex is the LOWEST point (and there is no "highest point").

If the parabola opens DOWN then the vertex is the HIGHEST point (and there is no "lowest point").

So what does a<0  tell you about the direction of opening of the parabola?

Put that together with what I wrote above, and you'll have your answer. :)

anonymous · Answer

thank you again !! you save my life again xD

debbieg · Answer

lol as much as I love math, it's rarely a matter of life & death... ;)  But I'm happy to help! :)