Question

just

Answer 1

\[f(x) = \frac 1{(3-x)}\]
so the obvious thing is that x cant equal 3, because when x = 3, you're dividing by zero... and you cant divide by zero
(anything over zero = infinity)
so the graph will look something like below:

Answer 2

really dodgey drawing, but u get the idea? jpeg version attached below as well if that makes it clearer?