The equation is .
Rewrite the equation is .
Find the which type of variation.
The quotients of or represent constant value, then it represents the direct variation.
The equation represents the direct variation.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9e15ee1ac2afce99d2c3b7aa21533242.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5e8f5057b81c306690279a71f0f3e335.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=312a1c27f22a0fce5dd99e6c1095adc4.png\")
or ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b803d7ed7b9a82f9b21a0f0ead52b211.png\")
represent constant value, then it represents the direct variation.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")