(3.5) Flashcard

Front

What is the slope of a line parallel to the line y = 4x - 9?

Back

The slope is 4.

Front

Write the equation of the line PARALLEL to the line y = 4x - 9 that passes through the point (-2, 4).

Back

y = 4x + 12.

Front

What is the slope of a line perpendicular to the line y = 3/2x + 6?

Back

The slope is -2/3.

Front

Write the equation of a line PERPENDICULAR to the line y = 3x + 2 that passes through the point (9, -2).

Back

y = -1/3x + 1.

Front

What are the slopes of perpendicular lines?

Back

They are opposite reciprocals.

Front

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

Back

Their slopes are equal.

Front

If two lines are perpendicular, how do their slopes relate?

Back

Their slopes are opposite reciprocals.

Front

What is the equation of a line that passes through the point (-3, 4) and is perpendicular to y = 3/2x + 6?

Back

y = -2/3x + 2.

Front

What does it mean for two lines to be parallel?

Back

They never intersect and have the same slope.

Front

What does it mean for two lines to be perpendicular?

Back

They intersect at a right angle (90 degrees).