document.write( "Question 70024: Ok, i have always told me kids they can come to me with any question on homework...im in over my head here. I dont even remember working on this stuff...
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document.write( "If u can just direct me with a few examples i should be able to figure it out...thank you for any n all help\r
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document.write( "example of questions:\r
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document.write( "find equation of the line passing through the given points...\r
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document.write( "(1,5)(2,7) possible answers r --- y=2/3x+3 or y=1/2x-4\r
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document.write( "huh? please help me \n" );
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Algebra.Com's Answer #49859 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! find equation of the line passing through the given points... \n" ); document.write( "(1,5)(2,7) \n" ); document.write( "---------- \n" ); document.write( "You want an equation of the form y=mx+b where m is the slope \n" ); document.write( "and b is the y-intercept. \n" ); document.write( "---------- \n" ); document.write( "There are a couple of ways commonly used to do that. \n" ); document.write( "One is called the point-slope form. \n" ); document.write( "1st: you need to find the slope = [change in y]/[change in x] \n" ); document.write( "=[7-5]/[2-1] = 2 \n" ); document.write( "2nd:Then you use the form: y-y1 = x(x-x1) \n" ); document.write( "y-5 = 2(x-1) \n" ); document.write( "y-5=2x-2 \n" ); document.write( "y=2x+3 \n" ); document.write( "-------------- \n" ); document.write( "There is another way popular in today's texts. \n" ); document.write( "1st Find the slope as we did above. \n" ); document.write( "2nd Substitute one of the point values into y=mx+b and solve for b \n" ); document.write( "5=2(1)+b \n" ); document.write( "b=5-2 \n" ); document.write( "b=3 \n" ); document.write( "Then write the equation y=2x+3 \n" ); document.write( "----------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |