The function is .
Graph:
Graph the function .
Observe the graph:
Hence the graph shown as a linear so, the function is a linear function.
The function is a linear function.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a95f57f5b7838ef8b8deb85586b447b9.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a95f57f5b7838ef8b8deb85586b447b9.png\")
.![\"\"](\"/userfiles/22-571-32.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")