Question 744739
Usually, 'y' is the dependant variable and x is the independent variable.  Function form would then be to arrange y as a function of x.  You have a linear equation in x and y.  Just solve for y.  The result will be in function form.


Starting with the given 15x+y=20:
Find the additive inverse of 15x. Add this number to left side and right side.  Simplify.  THAT is your function!