Finding the domain and range of a function without a graph?
i know the answer, i just don't know how to get there.

Domain:
Range:

Explanation: Domain and range are all about restrictions within the x and y-ordinates.

Let's first talk about domain:
Essentially, the big question is "what can't x be?"
If x can be any number, then the domain will be under the set:
If x can't be a specific number, then the domain will still be under

So, since we have a straight line, x can be any number, hence:

Range:
The range is a little bit harder for more complex graphs, such as the graph of , but if it's a straight line, then we know that y can be any value. Any input will produce an output, and an output can produce an input.

Hence, the range will become: