What is the slope of a line parallel to the line represented by the equation $$y = mx + b$$ ?

The slope of a line parallel to $$y = mx + b$$ is the same as $$m$$ .

What is the slope of a line perpendicular to the line represented by the equation $$y = mx + b$$ ?

The slope of a line perpendicular to $$y = mx + b$$ is the negative reciprocal of $$m$$ , which is $$-\frac{1}{m}$$ .

If two lines have slopes $$m_1$$ and $$m_2$$ , when are they perpendicular?

They are perpendicular if $$m_1 \times m_2 = -1$$ .

Write the equation of a line PERPENDICULAR to $$y = 2x + 1$$ that passes through the point (3, 2).

$$y = -\frac{1}{2}x + \frac{7}{2}$$ .

Writing equations of parallel and perpendicular lines Flashcards

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Two lines that are parallel will have ...

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Slope that is the same.

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