![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Observe the figure, then make a table of ordered pairs.
\| \
x \ | \
–1 | \0 | \1 | \2 | \3 | \4 | \5 | \6 | \
| \
y \ | \
7 | \6 | \5 | \4 | \3 | \2 | \1 | \0 | \
The difference of the x values is 1, and the difference of the y values is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=90a2dffa4cf28836c23bfcd658a94d29.png\")
1.
The sum in x values y values are 6.
\Then the equation of the function ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3458c081a3726d80e388c56ca7c9d769.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The solution of the equation is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3458c081a3726d80e388c56ca7c9d769.png\")
.