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OpenStudy (madeleine2):
A line has a slope of -1 and contains the points (1, 2) and (2, y). The value of y is 1 3 -1
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OpenStudy (jackthegreatest):
ok the formula for slope is m = (y1-y2)/(x1-x2)
OpenStudy (jackthegreatest):
so plug in what you know (the coordinates)
OpenStudy (jackthegreatest):
and the slope
OpenStudy (jackthegreatest):
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