Question

For each of the following queswtion, show that the four lines are in the same family
a) 3x+y-6=0 : y=-3-5 ; 9x+3y-11=0 ; y-4=3(1-x)

Answer 1

Think the second one should be -3x-5.

Anyway, just write them all in the form y = mx + c and all the m's are the same, so all parallel.