Question

Consider the function represented by 9x+3y= 12 with x as the independent variable. How can this function be written using
function notation?

f(y) = -1/3y+4/3
f(x) = -3x+4
f(x) = -1/3x + 4/3
f(y) = -3y+4​

Answer 1

You only have to write the expression for y and change y by f(x). This is:

9x + 3y =12
3y = -9x +12
y = -3x + 4
f(x)= -3x+4

Then, the answer is B