Now label the x and y-axis. Now label each line on the x and y axis with a scale of one. A plane is a flat surface that continues out infinitely. The best way to see what a plane is like is to imagine a piece of paper that never ends.
Infinity is the biggest number that there is.
So a plane stretches out to the end of the universe. Yes, it stretches to the end of the universe and much farther. A line is made up of at least two points that are on a straight path. Yes, very good. Let's draw one.