1. Parallel Lines Lines are parallel if they have the same slope.
Parallel lines - lines in the same plane that never intersect
Graph the following questions on the same graph
 y = -3x +4  6x + 2y = -10
Lines are parallel if they have the same slope.

2. ~slopes of the lines are "negative reciprocals"
Perpendicular Lines
Perpendicular lines - lines in the same plane that intersect to form a right angle
Graph the following questions on the same graph
 3y = 9x + 3 6y +2x = 6
Perpendicular lines and Slope:
~slopes of the lines are "negative reciprocals"
 - opposite signs and reciprocals
~ also the product of the slopes is -1

3. Determine if the lines are parallel, perpendicular or 
neither.
1.) 3x - y = -5 and  5y - 15x = 10
2.) 4y = -12x + 16 and y = 3x + 4
3.) 2y - x = 2 and 8x + 4y -2 =0

4. Write an equation of the line that is parallel to the given 
line and passes through the given point.
1.) y = 5x + 2 (3,2)
 - has the same slope
 - use y = mx +b to find the y-intercept
2.) y= -2x -1 (2,6)

5. - the slope is the opposite of the reciprocal
Write an equation of the line that is perpendicular to the 
given line and passes through the given point.
3.) y = -3x + 9 (3,1)
 - the slope is the opposite of the reciprocal
 - use y = mx +b to find the y-intercept
4.) y = -3x + 1 and passes through the point (4, 2).