document.write( "Question 1108574: Find “a” given that P(-3,4), Q(2,6) and R(5,a) are collinear with proper steps. \n" ); document.write( "
Algebra.Com's Answer #723550 by Edwin McCravy(20067)\"\" \"About 
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document.write( "PQ, PR and QR are all segments of the same line, so they\r\n" );
document.write( "all three must have the same slope:\r\n" );
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document.write( "We can pick any any two pairs of the three point, use the\r\n" );
document.write( "slope formula on both pairs, set the two expressions for\r\n" );
document.write( "the slope equal to each other, and solve for \"a\".\r\n" );
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document.write( "If we pick PQ and PR\r\n" );
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document.write( "Solve for a\r\n" );
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document.write( "Edwin
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