Question

Is the equation f(x)=3x+2 a function??

Answer 1

yes

Answer 2

Yes. All polynomials are functions, and the domain doesn't even have any restrictions. You can check by graphing it and using the vertical line test.

Answer 3

Alright and can you tell me the inverse of that function please?!

Answer 4

Four steps: 1) Let f(x) = y = 3x+2.
2) f^-1(x) is implied by x=3y+2. (Switch all the x's and y's).
3) Solve for y, in this case, y =x/3-2/3
4) y=x/3-2/3=f^-1(x).