Question

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

function notation?
FW) = - V+
f(x) = - 3x + 4
F(x) = - *x +
FLD = -3y+4

Answer 1

f(x) = - 3x + 4

Explanation:

Note that y = f(x)

Given

9x + 3y = 12 ← Rearrange making y the subject

Subtract 9x from both sides

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

y = - 3x + 4, thus

f(x) = - 3x + 4