To determine the possible value of \( x \) for the ordered pair \( (x, -9) \) to be located in Quadrant IV, we need to understand the characteristics of each quadrant.
In Quadrant IV, the x-values are positive and the y-values are negative. The ordered pair \( (x, -9) \) has a y-value of -9, which is indeed negative, meaning the pair can be in Quadrant IV if the x-value is positive.
From the given options:
- 8 (positive)
- -7 (negative)
- 0 (not positive)
- -1 (negative)
The only positive value from these options is 8.
Thus, the correct answer is:
**8**