Writing Equations of Parallel or Perpendicular Lines

Front

What is the slope of a line that is parallel to another line?

Back

The slope of a line that is parallel to another line is the same as the slope of that line.

Front

What is the slope of a line that is perpendicular to another line with slope m?

Back

The slope of a line that is perpendicular to another line with slope m is -1/m (the opposite reciprocal).

Front

Write the equation of a line parallel to y = 3x + 2 that passes through the point (1, 4).

Back

y = 3x - 1.

Front

Write the equation of a line perpendicular to y = -rac{1}{2}x + 3 that passes through the point (2, 1).

Back

y = 2x - 3.

Front

What type of line runs parallel to the y-axis?

Back

Vertical line.

Front

What type of line runs parallel to the x-axis?

Back

Horizontal line.

Front

If two lines are parallel, what can be said about their slopes?

Back

Their slopes are equal.

Front

If two lines are perpendicular, what can be said about their slopes?

Back

Their slopes are opposite reciprocals.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.