Question

How do you find the domain and range of `f(x) = 3x + 1`?

Answer 1

See below

Explanation:

The domain of a function is all possible values it can take on for `x`, a simple polynomial like `f(x) = 3x + 1` can take on all real numbers so it's domain is `RR`, so this means there is no real number which makes this function undefined.

Similarly the range is also `RR`, because the `y` value of the function can take on all real values, this can be seen from the graph as the line infinitly spans the `y` axis.

graph{3x+1 [-10, 10, -5, 5]}