![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The line passes through the points ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=75e10ee040e3e22c4033d2e479a8e955.png\")
.
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2bb07089155f38dc5980a5fac517d557.png\")
in the slope formula ![\"\"](\"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=c0fb314367849b021a198f105238fbc8.png\")
.
The another line passes through the points ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3d8c72a42fbfeabf4c73721936ef0eb5.png\")
.
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c3ab7674bff6d92706b3debcff02ae35.png\")
in the slope formula .
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=46dd904ec72e9dff2ab3bbd0793a8af2.png\")
.
The two slopes are negative reciprocals, so the two lines are perpendicular. ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Yes, the two lines are perpendicular.