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Mathematics
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OpenStudy (anonymous):
how do you find the slope of a line?
13 years ago
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OpenStudy (anonymous):
slope=(y2-y1)/(x2-x1)
13 years ago
OpenStudy (hoblos):
it is the variation of the ordinates over the variation of the abscissas
13 years ago
OpenStudy (amistre64):
by knowing 2 points on a line we can establish a slope for the line as a ratio of the change in y values with respect to the change in x values
13 years ago
OpenStudy (amistre64):
slope doesnt care about position; so x1 or x2 has no defined "point"
13 years ago
OpenStudy (anonymous):
\[(\Delta y)/(\Delta x) = Rise/Run\]
13 years ago
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OpenStudy (amistre64):
the vector from point tp point does care about position; but slope itself is amibiguious
13 years ago
OpenStudy (amistre64):
P(5,2) Q(7,8)
2-8 8-2 6 -6
--- = --- = --- = --- = 3
5-7 7-5 2 -2
13 years ago
OpenStudy (anonymous):
y2-y1/x2-x1
13 years ago
OpenStudy (anonymous):
or rise/run
13 years ago
OpenStudy (amistre64):
since I tend to transpose numbers when trying to "fill in" the formula; I just step it out
P-Q and stack y/x
P(5,2)
-Q(7,8)
-------
-2,-6 ; y/x = -6/-2= 3
13 years ago
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OpenStudy (anonymous):
so if it looks like..|dw:1331575471408:dw|
13 years ago
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