To determine the distance between 13.48 and −3.46 on a number line, we can use the formula for distance between two points \( a \) and \( b \):
\[ \text{Distance} = |a - b| \]
In this case, \( a = 13.48 \) and \( b = -3.46 \). Plugging in these values gives us:
\[ \text{Distance} = |13.48 - (-3.46)| = |13.48 + 3.46| = |16.94| = 16.94 \]
Therefore, the distance between 13.48 and −3.46 on a number line is 16.94.