To find the range of a set of numbers, you subtract the smallest number from the largest number in the set.
The numbers provided are: -7, 5, 8, 8, -9, -5, 7, -9.
- Identify the largest number: 8
- Identify the smallest number: -9
Now, compute the range:
\[ \text{Range} = \text{Largest} - \text{Smallest} = 8 - (-9) = 8 + 9 = 17 \]
Therefore, the range of the given numbers is 17.