document.write( "Question 294626: find an equation of the line containing the given pair of points. (-1,-3)and(-4,-7) \n" ); document.write( "
Algebra.Com's Answer #212513 by nerdybill(7384)\"\" \"About 
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find an equation of the line containing the given pair of points. (-1,-3)and(-4,-7)
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\n" ); document.write( "First, determine the slope:
\n" ); document.write( "m = (y2-y1)/(x2-x1)
\n" ); document.write( "m = (-7-(-3))/(-4-(-1))
\n" ); document.write( "m = (-7+3)/(-4+1)
\n" ); document.write( "m = (-4)/(-3)
\n" ); document.write( "m = 4/3
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\n" ); document.write( "Plug one of the given points (-1,-3) and the slope above (4/3) into the \"point-slope\" form:
\n" ); document.write( "y-y1 = m(x-x1)
\n" ); document.write( "y-(-3) = (4/3)(x-(-1))
\n" ); document.write( "y+3 = (4/3)(x+1)
\n" ); document.write( "y+3 = (4/3)x + (4/3)
\n" ); document.write( "y = (4/3)x + (4/3) - 3
\n" ); document.write( "y = (4/3)x + (4/3) - 9/3
\n" ); document.write( "y = (4/3)x - 5/3 (this is what they're looking for)\r
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