Question

What is the vertex of `y= -2(x-3)^2-1`?

Answer 1

Vertex`->(x,y)=(3,-1)`

Explanation:

When the quadratic equation is in this form you can almost read the coordinates of the vertex strait off. It just needs a little tweaking.

Suppose we wrote it as `y=a(x+d)^2+f`

Then the vertex `->(x,y)=(-d,f)`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Using the format of the above example we have:

Vertex`->(x,y)=(3,-1)`