What is an absolute number on a number line?
Numbers can have an absolute magnitude, which means the size of
the number whether positive or negative (in other words, 5 or -5
both have an absolute magnitude of 5) but there is no established
meaning for "absolute number". Numbers can be a variety of things;
they can be real or imaginary, they can be rational or irrational,
they can be transcendental, they can be finite or transfinite. But
they are not described as absolute (again, except in the contest of
absolute magnitude).