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Home > INT1 > Chapter 7 > Lesson 7.1.6 > Problem 7-71

7-71.

Each of these number lines shows a segment in bold. Determine the midpoint of the bold segment. Note that the diagrams are not drawn to scale.

The midpoint is the mean, or average. What is the mean of each of these pairs of numbers?

  1. A number line is given. The graph starts with a closed circle on 3 and is continuous until 9 where it is marked as a closed circle.

  2. A number line is given. The graph starts with an closed circle on negative 1 and is continuous until 7 where it is marked as a closed circle.

  3. A number line is given. The graph starts with a closed circle on negative 15 and is continuous until 2 where it is marked as a closed circle.

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