SOLUTION: Explain why the line x=4 is a vertical line.

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Question 429348: Explain why the line x=4 is a vertical line.
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
It is because the function contains all ordered pairs with an x-coordinate 4. If you connect all such points on an xy-plane, it will be a vertical line.