# What is the slope of a line parallel to the line x = ?

You need to remember that x = ? is a vertical line. The slope of any vertical is undefined.

Any line parallel to a vertical line is also a vertical line meaning that the slope of that line will also be undefined.

Remember that the slopes of parallel lines are always equal.

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The slope of a line parallel to the line x = ? is undefined.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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