Question

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

function notation?
Cof
OFW = - +
Of(x) = - 3x + 4
f(x) =
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Answer 1

f(x) = - 3x + 4

Explanation:

Change the subject of the function to y, that is

Given

9x + 3y = 12 ( subtract 9x from both sides )

3y = - 9x + 12 ( divide all terms by 3 )

y = - 3x + 4, that is

f(x) = - 3x + 4