PERPENDICULAR LINES AND PARALLEL LINES

Slopes of parallel lines are

• Negative reciprocals

• The same

• Opposites

• Always 7

Slopes of perpendicular lines are..

• negative reciprocals

• opposite

• the same

 $y=3x\ -3\$  
 $y\ =\ 3x\ +11$  

These lines are....

• Perpendicular

• Parallel

• Neither

A line is perpendicular to y = 2x - 7

What is the slope of this line?

• -2

• 1/2

• 2

• -1/2

 $y=6x+7$  

 $y=-6x-11$  

These lines are

• Parallel

• Perpendicular

• Neither

What is the slope of a line perpendicular to 5?

• -1/5

• -5

• 1/5

• 5

Select all that are true.

• Parallel lines never intersect.

• Perpendicular lines never intersect.

• Parallel lines intersect at a right angle.

• Perpendicular lines intersect at a right angle.

Determine the equation of a line perpendicular to y = -3x-2 and going through the point (9,2) in slope intercept form.

• $y=\frac{1}{3}x-3\$

• $y=-\frac{1}{3}x-9\$

• $y=\frac{1}{3}x-1$

• $y=-3x-9$