Algebra.Com's Answer #717202 by ikleyn(52802)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( "Find the equation of the line joining the points (2,11) and (4,17)
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document.write( "First, calculate the slope.\r\n" );
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document.write( " The formula for the slope of a straight line passing through two given points ( , ) and ( , ) is\r\n" );
document.write( " m =  .\r\n" );
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document.write( " Substitute the given data = 2, = 11, = 4, = 17 into the basic formula\r\n" );
document.write( " m =  =  = 3.\r\n" );
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document.write( "Next, find an equation of the line having the slope 3 and passing through the given point (2,11).\r\n" );
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document.write( " An equation of a straight line in a coordinate plane which has the slope m and passes through the given point P = (a,b) is \r\n" );
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document.write( " y - b = m*(x-a). \r\n" );
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document.write( " Substitute here m = 3, a = 2, b = 11, and you will get\r\n" );
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document.write( " y - 11 = 3*(x-2).\r\n" );
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document.write( " It is the equation in the slope-point form.\r\n" );
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document.write( " If you want to have it in the slope-intercept form, transform it in this way\r\n" );
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document.write( " y = 3x - 6 + 11, or\r\n" );
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document.write( " y = 3x + 5.\r\n" );
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document.write( "See the lesson\r
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document.write( " - Equation for a straight line in a coordinate plane passing through two given points\r
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document.write( "in this site.\r
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