True or False: All vertical lines have a slope (rate of change) of 0.
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This is False. Remember, Vertical lines have no slope at all; only horizontal ones do. The reason that vertical lines have no slope is because if you try to do the change in vertical line divided by the change in horizontal line, you'll end up with having to divide by 0, which is impossible. So that means that it's undefined. SO the answer is false.