1. **State the problem:** Determine if the relation consisting of the points (19, 18), (19, -8), and (-12, 18) is a function. 2. **Recall the definition of a function:** A relation is a function if every input (x-value) corresponds to exactly one output (y-value). 3. **Analyze the given points:** - The points are (19, 18), (19, -8), and (-12, 18). - Notice that the x-value 19 corresponds to two different y-values: 18 and -8. 4. **Conclusion:** Since the x-value 19 maps to two different y-values, this relation is **not** a function. **Final answer:** No, this relation is not a function.