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

f(x) = - 3x + 4

Step-by-step explanation:

Given

9x + 3y = 12

Rearrange making y the subject by subtracting 9x from both sides

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

y = - 3x + 4, thus

f(x) = - 3x + 4 ← in functional notation

step-by-step explanation:

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb