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The line that passes through (-1, -3) and (2, 1)
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Asked 1/2/2013 12:08:00 AM
Updated 8/13/2014 1:49:39 AM
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Flagged by jeifunk [8/13/2014 1:49:39 AM]
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User: The line that passes through (-1, -3) and (2, 1)





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Expert answered|chico007hgo|Points 492|

User: Find the slope of the line that passes through the points (2, 1) and (-1, -1). A.0 B.2 C.2/3

Question
Asked 1/2/2013 12:08:00 AM
Updated 8/13/2014 1:49:39 AM
2 Answers/Comments
This conversation has been flagged as incorrect.
Flagged by jeifunk [8/13/2014 1:49:39 AM]
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The line that passes through (-1, -3) and (2, 1) is y=4/3x-5/3.
Assuming that y=ax+b, put the two points into the equation,
-3=-a+b, 1=2a+b.
1+3=2a+a
4=3a
a=4/3,
b=1-2a
=1-2x4/3
=1-8/3
=3/3-8/3
=-5/3.
So y=4/3x-5/3.
Added 8/13/2014 1:41:38 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/13/2014 1:49:51 AM]
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The slope of the line that passes through the points (2, 1) and (-1, -1) is 2/3.
Assuming that y=ax+b, put two points into it
1=2a+b.-1=-a+b
2=3a
a=2/3.
b=-1+a
b=-1+2/3
b=-1/3.
y=2/3x-1/3.
2/3 is the slope.
Added 8/13/2014 1:47:56 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/13/2014 1:50:42 AM]
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The slope of the line whose equation is 2x + 5y + 1 = 0 is
Weegy: 2 (5) = 5 (7) + 7 User: The slope of the line whose equation is 2x + 5y + 1 = 0 is Weegy: To find the slope of this line, put the equation into SLOPE INTERCEPT FORM: y=mx+b. This is the easiest method for solving this type of problem, because the 'm' in slope-intercept form equals your slope. [ To put it in this form, isolate y. . ] (More)
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Expert Answered
Updated 8/13/2014 1:33:18 AM
1 Answer/Comment
The slope of the line whose equation is 2x + 5y + 1 = 0 is -2/5.
2x+5y+1=0
5y=-1-2x
y=-1/5-2/5x
y=-2/5x-1/5.


Added 8/13/2014 1:27:59 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/13/2014 1:33:57 AM], Rated good by jeifunk
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