Answer:
Option A does not give the right expression.
Step-by-step explanation:
On the number line if there are two points P(a) and Q(b) given by coordinates a and b, then the distance between those two points will be given by
d = |a - b| ......... (1)
which is independent of the position of the points.
Therefore, if point A is at - 3.5 and point B is at 7.5, then the distance between point A and point B will be given by |7.5+3.5| or |- 3.5-7.5| or |7.5-(-3.5)|, but not by |7.4-3.5|.
Hence, option A does not give the right expression. (Answer)
