How do you rewrite an equation in function form?

I would set up a table of values and calculate several of the values of the variables (I would try to calculate the "interesting" values setting one to zero and calculating the other(s), guessing at...

Let's say: Mr. Mikey has 2 more boards than Mr. Loy. Okay, now let's do the function using x and y x(1)(2)(3)(4) y(3)(5)(7)(9) Okay, now we'll do the mathematical equation: First we'll use y because...

You need it in the form f(x)= ... (whatever your equation happens to be). i.e get the equation in the form y=... Then swap the 'y' for 'f(x)'. Simple.

f(x) = mx +b. m and b are arbitrary constants.

y=3x+12