Question

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

function notation?

Fly) = -

f(x) = - 3x + 4

f(x) =

FCV) = -3y+ 4

Answer 1

f(x) = -3x + 4

Explanation:

Step 1: Write it in slope-intercept form

9x + 3y = 12

3y = -9x + 12

y = -3x + 4

Step 2: Replace y with f(x)

f(x) = -3x + 4

In math, function f(x) is equal to the variable y.