Parallel and Perpendicular Lines and Equations

Are these lines perpendicular?
y = (1/2)x + 2
y = -2x + 13

• YES

• NO

Write an equation of a line that passes through the point (-2,3) and is perpendicular to the line x = 4

• y = 3

• x = -3

• y = -3

• x = 3

y = 5/7x +2
y = 5/7x - 30
These lines are...

• Parallel

• Perpendicular

• Neither

Are the two linear equations parallel, perpendicular, or neither?

• Parallel

• Perpendicular

• Neither

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• identical.

• always 7.

Slopes of perpendicular lines are...

• opposite reciprocals.

• opposites.

• identical.

• always 7.

What slope is parallel to:  
m = 4

• 4

• -1/4

• -4

• 1/4

What slope is perpendicular to:  
m = 5/8

• -5/8

• 5/8

• -8/5

• 8/5

What slope is perpendicular to:  
m = 3

• -3

• -1/3

• 1/3

• 3

y = -2/3x + 2
y = 3/2x + 9
These lines are...

• Parallel

• Perpendicular

• Neither