![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Observe the table:
\The ordered pair are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c5c81725893ae65c9106a6884c6abb77.png\")
.
Find the first differences of ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b1f02a70f7489dd3b8742e9e1c94d6d0.png\")
-values in the ordered pair.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2da80b05ae53155bbfd68bc1b1c06021.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4abd3ce195174301f3e58148795d10f4.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d6421cb83cc17409f796f4649130b8a6.png\")
Since, the first differences are all equal,
\Therefore, the table of values are represent a linear function.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The table of values are represents a linear function.