# How do you find a standard form equation for the line with (-1,-2) ; perpendicular to the line 2x+5y+8=0?

##### 1 Answer

**or**

#### Explanation:

Always keep in mind that when two lines are perpendicular, the **product** of their **slopes** is **-1**.

**Proof** :-

slope intercept equation of a straight line is given as:-

given line

comparing with slope intercept form, slope

let slope of second line be

since it passes through

hence equation becomes,

Hence required equation is **or**