# For what values of x is #f(x)=-x^2+4x+2# concave or convex?

##### 1 Answer

Dec 3, 2016

The function is concave.

#### Explanation:

For critical points,

Let's do a sign chart

So

graph{-x^2+4x+2 [-16.02, 16.02, -8.01, 8.01]}