The graphs of the equations 2x+3y-2=0 and x-2y-8=0 are two lines which are
(a) coincident
(b) parallel
(c) intersecting exactly at one point
(d) perpendicular to each other
The graphs of the equations 5x-15y=8 and 3x-9y=245 are two lines which are
At what point do the lines of equations 3x + 2y + 5 = 0 and 2x − 3y − 1 = 0 intersects each other? Find one more point on each of these lines. Prove that these lines are perpendicular.