![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The given table of ordered pairs.
\| \
x \ | \
\
1 \ | \
\
2 \ | \
3 | \4 | \5 | \
| \
y \ | \
\
5 \ | \
\
10 \ | \
15 | \20 | \25 | \
The difference of the x values is 1, and the difference of the y values is 5.
\The difference in y values is five times the difference of x values.
\Then the equation of the function f (x) = y = 5x.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The solution of the equation is y = 5x.