To determine the distance between 6.5 and -7.2 on a number line, you can use the formula for distance between two points, which is:
\[ \text{Distance} = |a - b| \]
In this case, \( a = 6.5 \) and \( b = -7.2 \):
\[ \text{Distance} = |6.5 - (-7.2)| \] \[ \text{Distance} = |6.5 + 7.2| \] \[ \text{Distance} = |6.5 + 7.2| = |13.7| \] \[ \text{Distance} = 13.7 \]
Thus, the distance between 6.5 and -7.2 on a number line is 13.7.