# What is the equation of the normal line of #f(x)=(x-3)/(x+4)# at #x=-1#?

##### 1 Answer

May 27, 2018

#### Explanation:

Recall: the quotient rule is given by

When

You just found the gradient of the tangent but we want the normal. Recall that there is a rule

ie.

When

Using the point gradient formula,