What is the domain and range in a function?

Domain means all the numbers that the function passes on the x-axis. for example, when you have a straight line horizontally without stopping, your domain is ∞ since it passes every number on the x axis. The same applies to the y-axis, but now it's every number that passes the y-axis of up and down. A straight line going up and down

without stopping has a range of ∞