2.5 Parallel and perpendicular Lines in the Coordinate Plane

Front

What is the slope of a line parallel to the line whose equation is: -2x + y = -7?

Back

2

Front

What is the slope in the equation: y = 4x + 3?

Back

4

Front

Are the lines -6x + y = 2 and 6x + y = 2 parallel, perpendicular, or skew?

Back

Skew

Front

What can be said about the slopes of parallel lines?

Back

The slopes of parallel lines are the same.

Front

What can be said about the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite (or negative) reciprocals.

Front

What is the slope of the line represented by the equation y = mx + b?

Back

m (the coefficient of x) is the slope.

Front

If two lines have slopes m1 and m2, when are they parallel?

Back

m1 = m2.

Front

If two lines have slopes m1 and m2, when are they perpendicular?

Back

m1 * m2 = -1.

Front

What is the slope of a line that is vertical?

Back

Undefined.

Front

What is the slope of a line that is horizontal?

Back

0.