Final answer:
The set of points whose distance from the x-axis is 2 is a horizontal line parallel to the x-axis.
Step-by-step explanation:
The set of points whose distance from the x-axis is 2 is a horizontal line parallel to the x-axis.
Let's label the points on this line as (x, y), where the y-coordinate is always 2. So, the set of points can be represented as {(x, 2) : x is a real number}.
For example, some points on this line are (1, 2), (0, 2), (-3, 2), etc.