The equation is .
Subtract 20x from each side.
Divide each side by 5.
.
The equation of the graph is
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e6e2dc0427dfd773412c358d28024c02.png\")
..![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c2c0f3186b052328db9772ebde70ad43.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=73557b05d6d362f09505e8fdf56070c8.png\")
.