Parallel Lines and Transversals

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes so that 2 of the lines are parallel and the third line is a transversal.

Hint

What do we know about the slopes of parallel lines and transversals?

Answer

There are multiple answers but two of the lines must be parallel (have the same slope) and the third must have a different slope.  One solution is 6x + 3y = 9, 4x + 2y = 8, x + 7y = 5

Source: Shelli Foust

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