The line passes through the points .
The slope of above line is .
The two lines are perpendicular, so their slopes are negative reciprocals.
Therefore slope of perpendicular line is .
The slope of perpendicular line is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0cedbd9bcae1d32c8d64262dfe7a17af.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e7702ef02c2ad62562856581dfb95519.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=15c386556a1f4d2c4e15b0de420a8e30.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bebac3e516e1daabcabe3f9d8d07afd4.png\")
.