Slopes of Lines: Parallel and Perpendicular Lines

Front

What is the formula to calculate the slope (m) between two points (x1, y1) and (x2, y2)?

Back

m = (y2 - y1) / (x2 - x1)

Tags

CCSS.8.EE.B.5

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and will never intersect.

Tags

CCSS.8.EE.B.5

Front

What does it mean for two lines to be perpendicular?

Back

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

Tags

CCSS.8.EE.B.6

Front

Find the slope between the points (-7, -13) and (1, -5).

Back

1

Tags

CCSS.8.EE.B.5

Front

Find the slope of a horizontal line.

Back

0

Tags

CCSS.8.EE.B.5

Front

Find the slope of a vertical line.

Back

Undefined

Tags

CCSS.8.EE.B.5

Front

Given points P(2, -1) and Q(-3, -1), what is the slope m(PQ)?

Back

0 (horizontal line)

Tags

CCSS.8.EE.B.5

Front

Given points R(-11, 9) and S(-7, 9), what is the slope m(RS)?

Back

0 (horizontal line)

Tags

CCSS.8.EE.B.5

Front

Given points P(-4, 17) and Q(1, -3), what is the slope m(PQ)?

Back

-4

Tags

CCSS.8.EE.B.5

Front

Given points R(-9, 3) and S(-5, 4), what is the slope m(RS)?

Back

1/4

Tags

CCSS.8.EE.B.5