1. The ratio of vertical change to horizontal change
between any 2 points on a line.
Rise
Run
falls
rises
vertical
horizontal

2. 2 4 1 6 4
m =
y2 - y1
x2 - x1
0 - 6
4 - 4 -6
undefined =
m =
y2 - y1
x2 - x1
3 - 6
7 - 4 -3 3 -1 =

3. slope
horizontal
vertical -1
perpendicular

4. md = mc = m = y2 - y1 x2 - x1 -1 - (-6) -3 - (-4) 5 1 2 - (-4) 2 - 1
2 - (-3)
4 - 3 6 5
k k3
parallel k2
k not parallel
mc =
7 - (-2)
5 - 2 = 9 3
= 3
md =
-8 - 4
1 - (-3)
-12 4 =
= -3
No, line c is not
parallel to line d
because they have
different slopes.

5. m =
y2 - y1
x2 - x1
6 - (-2)
5 - 1 8 4 2
m1 × m2 = -1 2
-1/2

6. a c slope rate m = y2 - y1 x2 - x1 m1 = 4 - 6 8 - 1 = -2 7 12 - 5
2 - 0 = 7 2
m2 = -2 7 2 ×
= -1
Yes, n T m
because their slopes are opposite reciprocals.
Delivery b

7. = =