document.write( "Question 322664: The linear equation y=0.16x+0.78 represents an estimate of the average cost of gas for year x starting in 1997 (“Consumer price index,” 2006). The year 1997 would be represented by x = 1, for example, because it is the first year in the study. Similarly, 2005 would be year 9, or x = 9.\r
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Algebra.Com's Answer #230989 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Substitute zero for . That leaves . Hence the -intercept is \r
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