GEO: 3-5 QC (parallel & perp. lines)
1. Tell whether the two lines are parallel perpendicular or neither by finding their slopes.
neither
a     b 
a // b
b
(-3, 3)
a
(1, 2)
(2, -2)
2. Tell whether the two lines are parallel perpendicular or neither by finding their slopes.
parallel
perpendicular
neither
b
(-3, 1)
a
(0,-3)
(1, 2)
(2, 0)
3. Tell whether the two lines are parallel perpendicular or neither by finding their slopes.
neither
perpendicular
parallel
b
a
(-3,-1)
(-3, 1)
(2, 0)
(3,-2)
4. Match the following graphs with an approximate     slope value.  Use capital letters.
A.  1/4           B.   0           C.   -5             D. undefined
slope=
slope=
slope =
slope=
5. What is the slope of a line perpendicular    to a line with a slope of -⅓ ?
6. What is the slope of a line perpendicular    to a line with a slope of ⅝ ?
7. Find the slope of the line CD if,     C=(1, -4) and D=(3, 3).
slope = 
8. Find the slope of a line parallel to a line    with a slope of ⅜.
slope = 
9.  Find the slope of a line perpendicular to a      line with slope m = - ⅜.
slope = 
10. Find the slope of the line ED if,       E=(0, 2) and D=(5, -3).      Simplify your result.
slope = 
11. Find the slope of the line AB if,       A=(-2, -3) and B=(4, -3).      Simplify your result.
slope = 
12. Drag the label that describes the slope of the       graphs below.
negative slope
?
Zero slope
?
positive slope
?
undefined
slope
?
13. Horizontal and vertical lines are       ____________________ perpendicular.
sometimes
 always 
never
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