Question 477661: Instructions say: "Find an equation in standard form for the line described." Here's the question: "Through P (-2, 1) and parallel to the line containing (1, 4), (2, 3). I have no idea. Could you please help?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Instructions say: "Find an equation in standard form for the line described." Here's the question: "Through P (-2, 1) and parallel to the line containing
(1, 4), (2, 3).
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The slope thru (1,4) and (2,3) is (3-4)/(2-1) = -1
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Any line parallel to that line must have a slope of -1
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Equation of the line you want:
x = -2, y = 1, m = -1
y = mx + b; solve b
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1 = -1*-2 + b
b = -1
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Equation:
y = -x-1
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Cheers,
Stan H.
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