Respuesta :

You should have put a picture so ppl would know what the question is askin
you can start by listing a bunch of coordinates where y=3

example- (4,3) (2,3) (5,3) (9,3) etc

all of these coordinates would start to create a line on the same line

in other words... to graph line y=3 you go to the coordinates where y would equal three and make a line connecting over the entire thing