document.write( "Question 937105:
\n" ); document.write( "Jillian recorded how much fertilizer she gave her roses and the number of blooms they produced. What is a good line of best fit for the data?\r
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\n" ); document.write( "\n" ); document.write( "A. y - 8 = 1(x-4)
\n" ); document.write( "B. y - 8 = -1(x-4)
\n" ); document.write( "C. y - 8 = 4/3(x-4)
\n" ); document.write( "D. y - 8 = -4/3(x-4)\r
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Algebra.Com's Answer #570551 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
A. y - 8 = 1(x-4)
\n" ); document.write( "B. y - 8 = -1(x-4)
\n" ); document.write( "C. y - 8 = 4/3(x-4)
\n" ); document.write( "D. y - 8 = -4/3(x-4)
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document.write( "Those are all in point slope form \r\n" );
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document.write( "y - y1 = m(x - x1)\r\n" );
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document.write( "All four of them go though the point (4,8)\r\n" );
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document.write( "We can immediately rule out B and D because they have \r\n" );
document.write( "a negative slope. Lines with a negative slope go downhill\r\n" );
document.write( "to the right like this \.  Your points go uphill\r\n" );
document.write( "to the right, like this /. \r\n" );
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document.write( "So the correct choice is either A or C.\r\n" );
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document.write( "Hold a ruler or straight edge (or imagine holding one) \r\n" );
document.write( "so that it goes through the point (4,8) and is as close \r\n" );
document.write( "to as many of the points as you can get it. Pick the two \r\n" );
document.write( "points that are the closest to the ruler or straight edge.\r\n" );
document.write( "I picked (6,10) and (9,14).   \r\n" );
document.write( "Use the slope formula:\r\n" );
document.write( "They have a slope of \"%2814-10%29%2F%289-6%29+=+4%2F3\"\r\n" );
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document.write( "What do you know! That's exactly the slope of one of the\r\n" );
document.write( "chices, C. \r\n" );
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document.write( "I didn't expect it to be exactly one of the slopes. It\r\n" );
document.write( "just happened to be exact. I only expected it to be close.  \r\n" );
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document.write( "Answer: C.\r\n" );
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document.write( "Edwin
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