Question

How do you graph the function `f(x)=x`?

Answer 1

See below

Explanation:

`f(x) =x:forall x in RR`

Let's think for a moment about what this means.
"`f` is function of `x` that is equal to the value `x` for all real numbers `x`"

The only way this is possible is if `f(x)` is a straight line through the origin with a slope of `1`.

In slope/intercept form: `y =1x +0`

We can visualise `f(x)` from the graph below.

graph{x [-10, 10, -5, 5]}