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## anonymous 4 years ago Pre Calc: Write an equation of the line perpendicular to the graph of x = 3 and passing through D(4, –1).

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1. anonymous

$$x=3$$ is vertical, so your line is horizontal horizontal line looks like $$y=\text{some number}$$ in your case that number is $$-1$$

2. anonymous

@satellite73 okay, how do I find a slope of x=3 to right a perpendicular equation?

3. saifoo.khan

The slope of a line like"---" is zero. The slope of a line like" | " is undefined.

4. anonymous

@saifoo.khan thanks a bunch <3

5. saifoo.khan

You welcome. @samalami

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