Slope of the two non vertical lines is
Replace in slope formula.
(Subtract:)
(Subtract: )
(Cancel common terms)
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Slope
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3113839441e3480450ece8dbc4b861da.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=781a56aed3c724c8a5f7cd4ad10620ca.png\")
in slope formula.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=13deb13224fd5df44c536be72f08b5bc.png\")
(Subtract:![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6d32fae6dbd1fa974e902e811ef7b5bd.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f807627e8f8cc43dd32bccf594b7d2b3.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f720ed1d19fda99a0f2f2d5727e280a0.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bbf2a9af10523dbff4e8feadccdd5db7.png\")
(Cancel common terms)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c0b7683dcb5692cab730f06712f49b9f.png\")
\ \
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")