![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The table is \
| \
x \ | \
\
0 \ | \
\
1 \ | \
\
2 \ | \
\
3 \ | \
| \
y \ | \
\
60 \ | \
\
45 \ | \
\
30 \ | \
\
15 \ | \
Observe that table; value of y is decreasing by 15 as x value increasing by one
\![\"\"](\"/userfiles/image/Library/Algebra1/increases_pa37_p12.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Write a verbal model for the current situation:
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3a8984aec157cde762cb29a5a5d400eb.png\")
The equation of y is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f190eff3ceb18339cc2865056ea54932.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The equation of y is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f190eff3ceb18339cc2865056ea54932.png\")
.