Parallel And Perpendicular Lines Worksheet Page 25
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50Refer to the figure at the right. Write an equation in
y
k
slope-intercept form for each line.
( 0, 5 )
k
10.
11.
( –1, 3 )
12. the line parallel to
that contains (4, 4)
( 0, 2 )
Application
O
x
INTERNET
For Exercises 13–14, use the following
information.
Justin’s current Internet service provider charges a flat
rate of $39.95 per month for unlimited access. Another
provider charges $4.95 per month for access and $0.95
for each hour of connection.
13. Write an equation to represent the total monthly cost for each plan.
14. If Justin is online an average of 60 hours per month, should he keep his current
plan, or change to the other plan? Explain.
Practice and Apply
Practice and Apply
Write an equation in slope-intercept form of the line having the given slope
and y-intercept.
For
See
1
2
5
15. m:
, y-intercept:
4
16. m:
, (0, 8)
17. m:
, (0,
6)
Exercises
Examples
6
3
8
15–20, 35, 36
1
2
1
1
18. m:
, y-intercept:
19. m:
1, b:
20. m:
, b: 1
21–26
2
3
9
3
1
2
27–30, 37–42
3
31–34, 43, 44
4
45–51
5
Write an equation in point-slope form of the line having the given slope that
Extra Practice
Extra Practice
contains the given point.
See page 759.
See page 759.
4
21. m
2, (3, 1)
22. m
5, (4, 7)
23. m
, ( 12,
5)
5
1
24. m
, (3, 11)
25. m
0.48, (5, 17.12)
26. m
1.3, (10, 87.5)
1
6
Write an equation in slope-intercept form
m
y
k
for each line.
n
k
27.
28.
m
n
29.
30.
31. perpendicular to line , contains ( 1, 6)
k
32. parallel to line
, contains (7, 0)
O
x
n
33. parallel to line
, contains (0, 0)
m
34. perpendicular to line
, contains ( 3,
3)
Write an equation in slope-intercept form for the line that satisfies the given
conditions.
35. m
3, y-intercept
5
36. m
0, y-intercept
6
37. x-intercept
5, y-intercept
3
38. contains (4,
1) and ( 2,
1)
40. x-intercept
5, y-intercept
39. contains ( 5,
3) and (10,
6)
1
41. contains ( 6, 8) and ( 6,
4)
42. contains ( 4,
1) and ( 8,
5)
43. Write an equation of the line that contains (7,
2) and is parallel to 2x
5y
8.
7
44. What is an equation of the line that is perpendicular to 2y
2
(x
7) and
4
contains ( 2,
3)?
148 Chapter 3 Parallel and Perpendicular Lines
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