document.write( "Question 73870: Write the equaition of the line through the points (-5,-7) and (-6,-4).\r
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Algebra.Com's Answer #52849 by rmromero(383) $\"\"$ $\"About$

You can put this solution on YOUR website!


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document.write( "Write the equaition of the line through the points (-5,-7) and (-6,-4).\r
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document.write( "A)  12; y=11*x+69\r
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document.write( "B)  11; y=12*x+68\r
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document.write( "C)  11; y=11*x+69\r
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document.write( "D)  12; y=12*x+68\r
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document.write( "You can solve this in two ways\r
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document.write( "       Slope - intercept Formula \r
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document.write( "            y = mx + b, where m = slope and b = y- intercept\r
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document.write( "      Formula for the Slope (m)\r
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document.write( "            m = ___________
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document.write( " Given two point , we solve for the slope\r
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document.write( "  (-5,-7) = (,)
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document.write( "  (-6,-4) = (,)\r
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document.write( "Substitute to the formula of the slope\r
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document.write( "                 -4 - (-7)
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document.write( "            m = ___________
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document.write( "                 -6 - (-5)\r
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document.write( "                 -4 + 7
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document.write( "            m = ___________
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document.write( "                 -6 + 5\r
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document.write( "                    3
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document.write( "            m = ___________ or -3
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document.write( "                   -1\r
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document.write( "Then solve for b (y - intercept) by using the formula slope-intercept form
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document.write( "(x,y) = (-5,-7) or (-6,-4), m = -3
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document.write( "we use (-5, -7) for (x,y)\r
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document.write( "                 y = mx + b
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document.write( "                -7 = -3(-5) + b
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document.write( "                -7 = 15 + b
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document.write( "           -7 - 15 = 15 - 15 + b
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document.write( "               -22 = b\r
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document.write( "Now we have m = -3 and b = -22\r
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document.write( "      Equation of the line\r
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document.write( "             y = mx + b
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document.write( "             y = -3x - 22\r
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document.write( "Equation of the line in standard form\r
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document.write( "            y = -3x - 22
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document.write( "           3x + y + 22 = 0\r
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document.write( "Note i don't know why the answer is not in the choices.
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