T3 Compare Eq's & Slopes of // & Perp Lines

Front

Back

Front

Back

Front

Two lines are parallel if they have...

Back

...the same slope.

Front

Two lines are perpendicular if their slopes are...

Back

...opposite reciprocals of each other.

Front

Back

...parallel (same slope of 2).

Front

Back

...perpendicular (slopes are -1/2 and 2, which are opposite reciprocals).

Front

Back

The slope is 0 (horizontal line).

Front

Back

The slope is undefined (vertical line).

Front

If two lines have slopes of 3 and -rac{1}{3}, they are...

Back

...perpendicular (opposite reciprocals).

Front

If two lines have slopes of 4 and 4, they are...

Back

...parallel (same slope).