Question

3x-15y=0 and 6x+10y=0. Are these lines parallel, intersecting, or one line?

Answer 1

intersecting

Answer 2

x/5 =y
-3/5x =y

slope not same, so not parallel
slope m1 not -1/m2m so not perpendicular
obviously, not same line
so, intersecting

Answer 3

Did you determine that based on the fact they are both equal to zero? Or how did you get that?

Answer 4

no, in order to see this, isolate y and youll have a line of form
y =mx +b
here, b was 0
if lines are perpendicular
m1 = -1/m2
if parallel, m1 =m2, but b1 not = b2
if same, same equation