Identifying Perpendicular Lines

What line is perpendicular to the y-axis?

• Line C

• Line B

• the line of y = x

• Line D

What line is perpendicular to the x-axis?

• Line H

• Line G

• Line E

• the line of y = x

The slopes of perpendicular lines are

• opposite reciprocals

• the same

• negative

• flipped

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

• -2

• 1/2

• -1/2

• 2

What kind of intersecting lines are these?

• Parallel Lines

• Perpendicular Lines

• adjacent

• opposite

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

• Parallel

• Perpendicular

• Neither

Two lines that are perpendicular lines have ...

• Slope that is opposite reciprocals

• No Slope

• Slope that is the same

• none of the above

Which figure shows a set of perpendicular lines?

• Figure 1

• Figure 2

• Figure 3

• Figure 4

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

• Parallel

• Perpendicular

• Neither

Which slope is perpendicular to the slope m = 4

• m = 4

• m = -4

• m = -\frac{1}{4}

• m = \frac{1}{4}