document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=403121>Question 403121</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The table lists the cost in millions of dollars for a 30-second super bowl commercial for the selected years.\r<BR>\n" );
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document.write( "table shows years as 1990,1994,1998,2004,2008<BR>\n" );
document.write( "table shows cost as 0.8,1.2,1.6,2.3,2.7\r<BR>\n" );
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document.write( "a)find a linear function f that models the data.\r<BR>\n" );
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document.write( "b)estimate the cost in 1987 and compare the estimate to the actual value of $0.6 million. Did your estimate involve interpolation or extrapolation?\r<BR>\n" );
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document.write( "c)use f to predict the year when the cost could reach $3.2 million.\r<BR>\n" );
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document.write( "I am very lost here, thanks in advance for any help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #285081 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=285081\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The table lists the cost in millions of dollars for a 30-second super bowl commercial for the selected years. <BR>\n" );
document.write( "table shows years as 1990,1994,1998,2004,2008<BR>\n" );
document.write( "table shows cost as 0.8,1.2,1.6,2.3,2.7<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Notice how cost increases 0.4 when years increases by 4<BR>\n" );
document.write( "So each each year the cost increases 0.1<BR>\n" );
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document.write( "Let 1990 be represented by x = 0 and notice that <BR>\n" );
document.write( "cost is 0.8 when x = 0.\r<BR>\n" );
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document.write( "a)find a linear function f that models the data.<BR>\n" );
document.write( "cost(x) = 0.1x + 0.8<BR>\n" );
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document.write( "b)estimate the cost in 1987 and compare the estimate to the actual value of $0.6 million. Did your estimate involve interpolation or extrapolation?<BR>\n" );
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document.write( "c(-3) =  0.1(-3)+0.8<BR>\n" );
document.write( "c(-3) = 0.5<BR>\n" );
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document.write( "Note: The model is not perfect as you can see that cost<BR>\n" );
document.write( "increases 0.7 in 6 years between 1998 and 2004.<BR>\n" );
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document.write( "c)use f to predict the year when the cost could reach $3.2 million. <BR>\n" );
document.write( "Solve 3.2 = 0.1x+0.8<BR>\n" );
document.write( "0.1x = 2.4<BR>\n" );
document.write( "x = 24<BR>\n" );
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document.write( "1990+24 = 2014<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
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