well, if a line is considered to conect two points, then two people is the minimum line.
1 is the first positive number on the number line.
An infinite number
Integers are positive and/or negative numbers. Fractions are not integers because they are not originally positive or negative. However, they can both be put on a number line and be considered an integer. Fractions aren't integers unless put on a number line. Integers don't have to be on a number line to be considered an integer.
Yes, it is considered a number. In the past, people had difficulties accepting zero as a number, but nowadays it is universally accepted as such.
The greatest number that is a lesser number when reflected in a vertical line is 0. When 0 is reflected across a vertical line, it remains 0, which is equal to itself and thus can be considered "lesser" in terms of its position on a number line. Any positive number, when reflected, would still be greater than 0.
Party line number is to chat to people
To help people differentiate it from the number one (1).
A line dance is a dance with a repeated sequence of steps in which a number of people dance in different groups or a line of people. It doesn't matter of which gender or who the people you dancing with.
It is useful for people who are learning arithmetic or those who have not mastered it. It enables them to do simple sums. For people who have basic numeracy a number line has little to offer.
No you can not. That would be considered identity theft.
If the ball hits the line, it is considered in.
If the ball touches the line, it is considered in.