SOLUTION: How do a rewrite an equation as the function (x).

Algebra ->  College  -> Linear Algebra -> SOLUTION: How do a rewrite an equation as the function (x).      Log On


   

Question 95583: How do a rewrite an equation as the function (x).
Answer by kiljoy(51) About Me  (Show Source):
You can put this solution on YOUR website!
Typically you would solve the equation for the y variable and replace it as f(x) or g(x), etc.
So something like,
3x%2By=9
Could be solved for y.
y=-3x%2B9
Then you would replace the y with f(x)
f%28x%29=-3x%2B9
This way you would solve for y when given an f(x).
So if you wanted to solve for f(2) It would be as follows.
f%282%29=-3%282%29%2B9
f%282%29=-6%2B9
f%282%29=3
This gives us the solution (2,3)