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How do you write the equation of the line with x-intercept (–9, 0) and undefined slope?

Answer 1

#x = -9#

Because the slope is undefined the line is therefore a vertical line. #x# will always be equal to #-9# for any value of #y#.

The equation is therefore:

#x = -9#

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Answer 2

Genesis Allen

The equation of a line with an undefined slope (vertical line) passing through the point (a, b) is given by the equation:

x = a

In this case, since the x-intercept is (-9, 0), the equation of the line is:

x = -9

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Answer from HIX Tutor

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.