Slopes of Parallel Lines and Perpendicular Lines

Use slope to determine if lines PQ and RS are parallel, perpendicular, or neither. Points: P(-9, -4), Q(-7, -1), R(-2, 5), S(-6, -1).

Tags

CCSS.8.EE.B.6

Given ( P(-4, 17), Q(1, -3), R(-9, 3), S(-5, 4) ), find the slopes ( m(PQ) ) and ( m(RS) ) and determine the types of lines.

Tags

CCSS.8.EE.B.6

Given ( P(2, -1), Q(-3, -1), R(-11, 9), S(-7, 9) ), find the slopes ( m(PQ) ) and ( m(RS) ) and determine the types of lines.

Tags

CCSS.8.EE.B.6

Given \( C(x, 16), D(2, -4), E(-6, 14), \) and \( F(-2, 4) \), find the value of \( x \) so that \( CD \parallel EF \).

Tags

CCSS.8.EE.B.6

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

Match the following to its perpendicular slope

• 5/7

• -7/5

• -4/5

• 15/4

• 3/2

• 5/4

• -4/15

• -2/3

Tags

CCSS.8.EE.B.5

Perpendicular lines have _________________ slope.

• The Same

• Opposite Reciprocal

Tags

CCSS.8.EE.B.6

• A
• B
• C
• D

Tags

CCSS.8.EE.B.6

Slopes of perpendicular lines are...

(a)  

• opposite reciprocals.

• negatives.

• identical.

• always fractions.

Tags

CCSS.8.EE.B.5

Slopes of perpendicular lines are...

• opposite reciprocals.

• opposites.

• identical.

• always 7.

Tags

CCSS.8.EE.B.5