document.write( "Question 72826: The graph of a function F(x)=mx + b contains the points (5,15) and (-3,-5). Find b. \n" ); document.write( "

Algebra.Com's Answer #52242 by rmromero(383) $\"\"$ $\"About$

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document.write( "The graph of a function F(x)=mx + b contains the points (5,15) and (-3,-5). Find b.\r
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document.write( "Formula for slope (m)\r
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document.write( "         
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document.write( "     m = __________
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document.write( "(,) = (5, 15)\r
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document.write( "(,) = (-3, -5)\r
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document.write( "            -5 - 15
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document.write( "       m = __________
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document.write( "            -3 - 5\r
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document.write( "             -20          5
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document.write( "         =  ______ or    ___
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document.write( "             - 8          2\r
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document.write( "To find the f(x),\r
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document.write( "        F(x) = mx + b , m = 5/2, (x, y) = (5, 15)\r
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document.write( "                  15 = (5/2)(5) + b
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document.write( "                  15 = 25/2 + b
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document.write( "           15 - 25/2 = b
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document.write( "         30/2 - 25/2 = b
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document.write( "                 5/2 = b 
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document.write( "   F(x) = (5/2)x + 5/2\r
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document.write( "The graph looks like this\r
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