# What is the equation of the normal line of #f(x)= -3x^2 # at #x=0 #?

##### 1 Answer

Nov 7, 2016

#### Explanation:

The tangent line at the vertex is the

**If you need to do this the long way**

The slope of the tangent line at

So the tangent line is a horizontal line and the normal line is the vertical line through