Equations of Vertical, Horizontal, Parallel, and Perpendicular Lines

Front

What is the slope of a line that is perpendicular to a line with a slope of 3?

Back

The slope of a line that is perpendicular to a line with a slope of 3 is -1/3.

Front

What is the equation of a horizontal line?

Back

The equation of a horizontal line is of the form y = b, where b is a constant.

Front

What is the equation of a vertical line?

Back

The equation of a vertical line is of the form x = a, where a is a constant.

Front

If two lines have the same slope, what can we say about their relationship?

Back

If two lines have the same slope, they are parallel.

Front

What is the slope of a line that is parallel to the line y = -4x + 1?

Back

The slope of a line that is parallel to y = -4x + 1 is -4.

Front

How do you determine if two lines are perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

Write the equation of a line that is parallel to y = 5x + 2 and passes through the point (1, 3).

Back

The equation is y = 5x - 2.

Front

What is the slope of a line with the equation y = 2x + 3?

Back

The slope of the line is 2.

Front

What does a slope of 0 indicate about a line?

Back

A slope of 0 indicates that the line is horizontal.

Front

What does an undefined slope indicate about a line?

Back

An undefined slope indicates that the line is vertical.