Two points are plotted on a number line: −11.2 and 3.3. What is the distance between these two points?

A 14.5

explanation

The distance between points A and B on a number line is the absolute value of the difference between those two points.
Distance is always a positive value. Evaluate the difference between the points and then apply the absolute value:
AB = |b − a| or |a − b|
= |−11.2 − 3.3|
= |−14.5|
= 14.5
Recall that the absolute value of a number is its distance from 0.