document.write( "Question 364099: A) find linear equation to approximate CPI y in year x, with x=0 corresponding to 1993 when CPI is 144.5 in 1993 & 184.2 in 2003 b) Estimate CPI in 2007 C) What rate is CPI increasing?\r
\n" ); document.write( "\n" ); document.write( "factor & solve: x2-5x+6=0, 5x2+17x+6=0 & x2-7x-30=0
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Algebra.Com's Answer #259691 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "*Note: Note using y = mx + b
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document.write( "x=0 corresponding to 1993 when CPI is 144.5 in 1993
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document.write( "y = mx + 144.5
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document.write( "m = 39.7/10 (change in y over change in x)
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document.write( "y = 3.97x + 144.5
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document.write( "Estimate CPI in 2007   Note: 14 years have passed
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document.write( "y = 3.97*14 + 144.5
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document.write( "What rate is CPI increasing 3.97/yr beginning in 1993\r
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document.write( "x^2-5x+6=0
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document.write( "factoring: 
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document.write( "representing as a PRODUCT,in this case(x-?)(x-?)...according to signs shown
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document.write( "(x-3)(x-2)works as -3x + -2x = -6x and (-3)*(-2) = 6 \n" );
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