![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Observe the table:
\The ordered pair are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e0e678624e73a6ec70d500b392d3771a.png\")
.
Find the first differences of ![\"\"](\"/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=016c16048f7e3d31f57a703a9ac8be69.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=757595f9053e839304a0a30b4978399a.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=95d41deeaf312e38b959f99edd2e0a2a.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cdf7e3ab519183e26da235d58dd3ff21.png\")
Since the first differences is all equal.
\So, the table of values represent a linear function.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The table of values represents a linear function.