# How do you find the equation of the tangent and normal line to the curve #y=9x^-1# at x-3?

##### 1 Answer

I'm not sure if you meant

If

Tangent is

If

Tangent is

#### Explanation:

I'm not sure if you meant

First we need the derivative, which will give us the slope of the tangent at any point:

We will use the formula

**When x=3**

Tangent:

Passes through

Normal:

Passes through

**When x=-3**

Tangent:

Passes through

Normal:

Passes through