document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1125196>Question 1125196</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1960, the average price per gallon of gasoline was 31 cents per gallon. From 1960 to 2000, prices increased, on average, by 2.5 cents per gallon per year.†<BR>\n" );
document.write( "(a)<BR>\n" );
document.write( "Using G for the price, in cents per gallon, and t for the time, in years, since 1960, use a formula to express G as a linear function of t.<BR>\n" );
document.write( "G =  <BR>\n" );
document.write( "  <BR>\n" );
document.write( "(b)<BR>\n" );
document.write( "What price per gallon does the model yield for 1990? (Note: The actual price was $1.00 per gallon.)<BR>\n" );
document.write( "$  <BR>\n" );
document.write( " per gallon<BR>\n" );
document.write( "(c)<BR>\n" );
document.write( "Use the Internet to find the average price of gasoline for the current year. Does the model from part a give a price near the current price?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #741511 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=741511\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ---------------------------------------------------------<BR>\n" );
document.write( "In 1960, the average price per gallon of gasoline was 31 cents per gallon. From 1960 to 2000, prices increased, on average, by 2.5 cents per gallon per year.†<BR>\n" );
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document.write( "x, number of years; x at 0 is for the year 1960.<BR>\n" );
document.write( "y, price in CENTS depending on x<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=2.5x%2B31 ALIGN=MIDDLE  ALT=\"y=2.5x%2B31\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "With that, you should be able to do parts (a) and (b) yourself.\r<BR>\n" );
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document.write( "(a)<BR>\n" );
document.write( "Using G for the price, in cents per gallon, and t for the time, in years, since 1960, use a formula to express G as a linear function of t.<BR>\n" );
document.write( "G = \r<BR>\n" );
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document.write( "(b)<BR>\n" );
document.write( "What price per gallon does the model yield for 1990? (Note: The actual price was $1.00 per gallon.)<BR>\n" );
document.write( "$ <BR>\n" );
document.write( "per gallon<BR>\n" );
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document.write( "You can simply change to the specified variables of the description and say  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28G%28t%29=2.5t%2B31%29 ALIGN=MIDDLE  ALT=\"highlight%28G%28t%29=2.5t%2B31%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "In 1990, this was 30 years past 1960.<BR>\n" );
document.write( "Predicted price would have been according to the model,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=G%2830%29=2.5%2A30%2B31 ALIGN=MIDDLE  ALT=\"G%2830%29=2.5%2A30%2B31\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=G%2830%29=highlight_green%28106%29 ALIGN=MIDDLE  ALT=\"G%2830%29=highlight_green%28106%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > cents<BR>\n" );
document.write( "A few cents high versus the actual statistic. </SPAN>\n" );
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