Answer: y = 1
Step-by-step explanation:
The equation y = 2 is horizontal. Anything parallel to this will also be horizontal. The answer is of the form y = k, where k is some real number. We replace k with 1 since we need the answer to go through (4,1). All points on the answer line have a y coordinate of 1.
The equation y = 1 is the same as y = 0x+1, which shows we have a slope of 0.