document.write( "Question 190915: write an equation of the line in slope-intercept form, containing the point (-4,5)and parallel to y=-3x=1. \n" ); document.write( "
Algebra.Com's Answer #143340 by nerdybill(7384)\"\" \"About 
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\"Slope intercept\" form:
\n" ); document.write( "y = mx + b
\n" ); document.write( "where
\n" ); document.write( "m is slope
\n" ); document.write( "b is y-intercept
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\n" ); document.write( "For:
\n" ); document.write( "y=-3x+1
\n" ); document.write( "The slope is -3
\n" ); document.write( ".
\n" ); document.write( "For a line to be parallel to this, it must have the same slope.
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\n" ); document.write( "Now, we know two things about our new line:
\n" ); document.write( "m = -3
\n" ); document.write( "crosses at (-4,5)
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\n" ); document.write( "Plug the above into the point slope form:
\n" ); document.write( "y - y1 = m(x - x1)
\n" ); document.write( "y - 5 = -3(x - (-4))
\n" ); document.write( "Now, we manipulate the above into the \"slope-intercept\" form:
\n" ); document.write( "y - 5 = -3(x + 4)
\n" ); document.write( "y - 5 = -3x - 12
\n" ); document.write( "y = -3x - 7 (this is what they're looking for)\r
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