Parallel or Perpendicular?

Front

What is the slope of a line perpendicular to the line represented by the equation y = 2x - 7?

Back

-1/2

Front

What is the slope of the line represented by the equation y = \frac{2}{3}x + 4?

Back

\frac{2}{3}

Front

What do we call lines that will never intersect?

Back

Parallel

Front

What slope is perpendicular to m = \frac{5}{8}?

Back

-\frac{8}{5}

Front

What is the relationship between the slopes of two perpendicular lines?

Back

The product of their slopes is -1.

Front

If two lines have slopes m_1 and m_2, what condition must be satisfied for them to be parallel?

Back

m_1 = m_2.

Front

If two lines have slopes m_1 and m_2, what condition must be satisfied for them to be perpendicular?

Back

m_1 * m_2 = -1.

Front

What is the slope of a line that is horizontal?

Back

0.

Front

What is the slope of a line that is vertical?

Back

Undefined.

Front

How do you find the slope of a line given two points (x_1, y_1) and (x_2, y_2)?

Back

Slope = \frac{y_2 - y_1}{x_2 - x_1}.