Perpendicular Lines

Write the equation of a line PERPENDICULAR to y = -2x + 1 that passes through the point (2, 3).

Slopes of perpendicular lines are...

• opposite (sign) reciprocals.

• opposites.

• identical.

• always 7.

A line is perpendicular to  
y = 2x - 7.
What is the slope of this line? 

• -2

• 1/2

• -1/2

• 2

What slope is perpendicular to:  
m = 5/8

• -5/8

• 5/8

• -8/5

• 8/5

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

• Parallel

• Perpendicular

• Neither

A line is perpendicular to    y = 2x - 7.
What is the slope of this line? 

• -2

• 1/2

• -1/2

• 2

Line a passes through (0, 3) and (-4, 8)

Line b passes through (0, 5) and (5,9)

Lines a and b are ?

• Parallel

• Perpendicular

• Neither

Slopes of perpendicular lines are...

• opposite reciprocals.

• opposites.

• identical.

• always 7.

Write the relation between the pair of lines

indicated by the arrows in each shape.