SOLUTION: For which values of 'a' are the lines 'y=ax+6' and 'x+2y=4' parallel?

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Question 419521: For which values of 'a' are the lines 'y=ax+6' and 'x+2y=4' parallel?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Parallel lines have the same slope. The second equation can be written as y = (-1/2)x + 2, so the slope is -1/2. Hence, a = -1/2.