What is the slope of the line represented by the equation x = -9?

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What is the slope of the line represented by the equation x = -9?

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Answer 1 · 2016-10-05T12:07:55

The slope of $x = - 9$ $x=-9$ is "undefined"

Explanation:

Slope is by definition $\frac{change in y}{change in x}$ $("change in "y)/("change in " x)$
but for $x = - 9$ $x=-9$ the value of $x$ $x$ does not change,
so $change in x = 0$ $"change in " x = 0$
and division by zero is "undefined"

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What is the slope of the line represented by the equation x = -9?

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