document.write( "Question 78319This question is from textbook Elementary Alegbra
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Algebra.Com's Answer #56170 by rmromero(383) $\"\"$ $\"About$

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document.write( "Find an equation of the line containing the given pair of points
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document.write( "(-1,-8) and (-4,-7)\r
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document.write( "Slope - Intercept Form of the equation will help us to find the equation
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document.write( "given two points. \r
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document.write( "              y = mx + b\r
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document.write( "STep 1. Find the slope given two points.
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document.write( "                       - 
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document.write( "       Slope or m =  ______________
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document.write( "                       - \r
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document.write( "(-1, 8) = (, )
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document.write( "(-4, -7) = (, )\r
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document.write( "         -7 - 8
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document.write( "  m =  ___________
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document.write( "         -4 -(-1)\r
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document.write( "        - 15
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document.write( " m =  ________
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document.write( "          -3\r
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document.write( "  m = 5\r
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document.write( "Step 3 : Find the y - intercept or b\r
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document.write( "       y = mx + b  where m = 5, x= -4, y = -7\r
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document.write( "Note : you can use either of the two points given. same slope of course\r
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document.write( "      -7 = 5(-4) + b
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document.write( "      -7 = -20 + b
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document.write( "  20 - 7 = b
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document.write( "      13 = b\r
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document.write( "Step 3: Substitute m = 5, b = 13 to slope -intercept form y = mx + b\r
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document.write( "           y = 5x + 13  ---> this is the equation in slope -intercept form\r
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document.write( "          5x - y = 13  ----> Equation in standard form.
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