Consider the function represented by 9x + 3y = 12 with x as the independent variable. How can this function be written using function notation? f(x)=____x+4
9x + 3y = 12 subtract 9x from both sides
3y = -9x + 12 divide both sides by 3
y = -3x + 4 and, for "y,' write "f(x)"
So
f(x) = -3x + 4
