Final answer:
The two lines with equations y=5 and y=−1 are parallel.
Step-by-step explanation:
To determine if the two lines with equations y=5 and y=−1 are perpendicular, parallel, or neither, we can examine their slopes. The slope of the first line is 0, since it is a horizontal line and does not change along the y-axis. The slope of the second line is also 0. Since the slopes of both lines are the same, they are parallel.