![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
For a new car, the market value decreases when the life time of car decreases.
\Graph :
\Graph of the market value of a new car as the function of time for a period of 20 years.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0116acca3e41c7c250440fce3e42e609.png\")
axis : Market value of the car.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=125b232ef6e98acd107d00dec780ae3f.png\")
axis : Life time of the car for 20 years.
![\"\"](\"/userfiles/50-20-18.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
Graph of the new car for a period of 20 years :
\