19)find the equation of a straight line passing through (0,-3) & (-4,-11)

20)find the equation of the straight line passing through the point (-6,-4) and parallel to the line 2x+3y-15=0.

21)find the equation of a straight line passing through the point (-3,3) and perpendicular to the line 5x+2y+21=0

22.the lines -6x+2y=1 and x+3y-5=0 are

a.parallel to eachother

b.perpendicular to eachother

c.parallel to the line -x-3y=0

d.perpendicular to the line 3x-2y-1=0

e.neither parallel nor perpendicular to eachother

thank you for helping me, this is part of my study guide for my final