Someone me with the answer am i right?

3. solve by graphing: y = 2x + 6 x + y = -3

Can someone tell me if this is perpendicular? !

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer