\
Two variables
x
and
y
show
direct variation
provided
.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=43a0be64afaf8e9c2dbd2ef486d62108.png\")
.