Respuesta :

kishorrock1315ow60os
according to the standard line equation

y=mx+c

on comparing the given equations with the standard one

for 1)m=3/4
     2)m=-3/4
     3)m=3/4
clearly line 1 and 3 have the same slope 


hence 1 and 3 are parallel

hope you understand
1 and 3 are parallel because the slopes are the same