![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Observe the figure, then make a table of ordered pairs.
\| \
x \ | \
\
–4 \ | \
–3 | \ \
–2 \ | \
–1 | \0 | \1 | \2 | \3 | \4 | \
| \
y \ | \
\
–2 \ | \
–1.5 | \ \
–1 \ | \
–0.5 | \0 | \0.5 | \1 | \1.5 | \2 | \
The difference of the x values is 1, and the difference of the y values is 0.5 (or) ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3b689abee47a723773b19578c12ca95b.png\")
.
The difference in y values is half of the difference of x values.
\Then the equation of the function ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=00c32eba5092fe9bd3ab6a26169165e8.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=00c32eba5092fe9bd3ab6a26169165e8.png\")
.