Equation of the straight line passing through two given points.
This rule gives us a one-line, mental method to write down the equation of the line passing through any two given points.
![This rule gives us a one-line, mental method to write down the equation of the line passing through any two given points.](https://stage.geogebra.org/resource/rawwxwcc/qijFXjxgzbYWvksr/material-rawwxwcc.png)
In the below app change the positions of the two points and use their co-ordinates to calculate the equation of the line passing through those points.