SOLUTION: are all linear equations functions?

Question 467749: are all linear equations functions?

Answer by gwendolyn(128) (Show Source): You can put this solution on YOUR website!
All linear equations are functions except for when the line is undefined. If you are unsure that a graph is a function, just see if there is more than one point for a y value. If there are no two points sharing a y value, then the line is a function.
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