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(x) = x + 4

Answer 1

f(x) = 4 - 3x (answer)

Explanation:

Answer 2

Start with 9x + 3y = 12, and solve for y, which represents f(x).

3y = 12 - 9x Divide both sides by 3:

y = 4 - 3x Replace y with "f(x)"

f(x) = 4 - 3x (answer)