Answer
As we know the real number contains a whole of the Mathematics inbuilt in himself.
The line has two moves , first from origin to right side and second from origin to left side.
Real numbers are vary from (- inf , inf ) .
All the number between real line like irrational number , rational number , whole number , natural numbers are contains automatically in it.
Mean that the real line containing all these numbers.
Work Step by Step
On the real number line, the origin is the point where the real number $0$ is located.
Thus, the answer is $\bf{\text{origin}}$.