Parallel and Perpendicular Slopes Given Points

Slopes of Parallel lines are ____________?

• opposites

• reciprocals

• equal

• oppostie reciprocals

Tags

CCSS.8.EE.B.5

Slopes of Perpendicular lines are __________?

• Opposite

• Reciprocals

• Opposite Reciprocals

• Equal

Tags

CCSS.8.EE.B.6

Are the lines Perpendicular? How do you know?

Line 1 runs through the point (0, -1) and (7, 1)

Line 2 runs through the point (-1, 4) and (2, -5)

• Yes, their slopes are opposite reciprocals

• No, their slopes are not opposite reciprocals

• Yes, their slope are the same

• No, their slopes are not the same

Tags

CCSS.8.EE.B.6

Are the given lines, parallel, perpendicular, or neither. Explain.

• Parallel, they have the same slopes.

• Perpendicular, because their slopes are opposite reciprocals.

• Neither, because their slopes are not the same and are not opposite reciprocals.

• Neither, because their slopes are zero.

Tags

CCSS.8.EE.B.6

Find the slope of the line through each pair of points.

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

Which is the equation of a line that passes through the point (-4,7) and is parallel to a line that has a slope of 1/4?

y = -2/3x + 2 y = 3/2x + 9 These lines are ​ (a)   because the slopes are ​ (b)   .

• perpendicular

• opposite reciprocals

• Parallel

• Neither

• the same

Tags

AI.9.2

y = -2/3x + 2

y = 3/2x + 9

These lines are ​ (a)   because the slopes are ​ (b)   .

• perpendicular

• opposite reciprocals

• Parallel

• Neither

• the same

Tags

AI.9.2

Choose the best answer to fill in the blanks.

Parallel lines always have the ​ (a)   slope.

Perpendicular lines have slopes that are ​ (b)   .

The product of perpendicular slopes always equals ​ (c)  

• same

• negative reciprocals

• -1

• reciprocals

• 1

• different

Tags

CCSS.8.EE.B.6

Which of the following slopes represents a line that is perpendicular to the line given by:

• m = -3/2

• m = 2/3

• m = 1/2

• m = -1.5

Tags

CCSS.8.EE.B.6