7. Two marks example problem III

The line \(r\) passes through the points \((-2,2)\) and \((5,8)\) and the line \(s\) passes through the points \((-8,7)\) and \((-2,0)\). Is the line \(r\) perpendicular to \(s\)?

 

Answer:

 

The line \(r\) is perpendicularnot perpendicular to the line \(s\).