Slopes of parallel lines are ____________.
Equal
Slope of perpendicular lines are __________ __________.
Opposite reciprocals
The slope of a line has a slope of 3/4. What is the slope of a line that is parallel to this line? What is the slope of a line that is perpendicular to this line?
Parallel m=3/4
Perpendicular m=-4/3
What is the formula used to find the slope?

Miss Cooper is making a map of Linsly on a coordinate plane. Two hallways in the school are perpendicular to each other. The main hallway passes through the points (-5, 9) and (4,6). The perpendicular hallway passes through the point (-4,3). What is the equation of the main hallway? What is the equation of the perpendicular hallway?
Main: y=-1/3x+22/3
Perpendicular: y=3x+15
What is the slope of the line parallel to the line
y=x-3
m=1
What is the slope of the line perpendicular to the line
y=-1/2x+5
m=2
0
What is slope-intercept form?
y=mx+b
What is the equation of the line that is parallel to the given line and goes through the given point?
y=-3x+2 ; (-2, -6)
y=-3x-12
What is the equation of the line that is perpendicular to the given line and goes through the given point?
y=-3 ; (3,-7)
x=3
Slope of a vertical line is ______.
Undefined.
What is point-slope form?

What is the equation of the line that is parallel to the given line and goes through the given point?
x=4; (6,2)
x=6
What is the equation of the line that is perpendicular to the given line and goes through the given point?
5x-3y=21; (5, 8)
y=-3/5x+11
Find the slope of the line that goes through the points (0, 7) and (3, 6)
m=-1/3
y=4 is a ________________ line.
horizontal
Line m passes through the point (5, -3) and is parallel to the line that passes through the points (1, -4) and (9, -2). What is the equation of line m?
y=1/4x-17/4
Line AB passes through the points (2, 13) and (5, 7). What is the equation of the line perpendicular to line AB that passes through the point (-2, 1)?
y=1/2x+2
On a map of a park, the starting point of a path is located at the point (7, 1) and the end point is (3, 13). Another path in the park is parallel to the first path and starts at the point (11, 11). What is the equation of the parallel path?
y=-3x+44
x=-3 is a ___________________ line.
vertical