Question 993358
This equation is in vertex form.
The vertex of the parabola is ({{{-1}}},{{{4}}}).
Since the multiplier for the quadratic term is negative ,{{{-2}}}, the parabola opens downwards and the maximum value occurs at the vertex.
So for x values before the vertex the y values are increasing and for x values after the vertex, the y values are decreasing.
Increasing : {{{x<-1}}}
Decreasing : {{{x>-1}}}
.
.
.
*[illustration cx4.JPG].