Question

What would be an example equation for a horizontal line passing through points (3,-7) ?

Answer 1

all horizontal lines are of the form y = k where k is any number

Answer 2

y=-7

Answer 3

so for example, y = 10 is a horizontal line through all points that have a y coordinate of 10

Answer 4

and as 123789dftr is saying, y = -7 is the answer because all points on the line y = -7 have a y coordinate of -7