document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1104227>Question 1104227</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The volume of gas in your car’s gas tank depends on the number of miles you have driven. <BR>\n" );
document.write( "Suppose you leave home with a full tank and begin driving at a constant speed. After driving 120 miles you have 12 gallons in your tank. <BR>\n" );
document.write( "After driving 220 miles you have 8.66 gallons in your tank. <BR>\n" );
document.write( "Assume the relationship is linear. \r<BR>\n" );
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document.write( "a. Find a function that models this situation.  (Input miles driven and output gallons of gas in your tank.)\r<BR>\n" );
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document.write( "b. How many gallons does your gas tank hold when full?\r<BR>\n" );
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document.write( "c. How many miles can you drive before you will run out of gas?\r<BR>\n" );
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document.write( "d. What is your car's approximate fuel efficiency in miles per gallon?\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 #718962 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52778)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=718962\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The volume of gas in your car’s gas tank depends on the number of miles you have driven. Suppose you leave home with a full tank <BR>\n" );
document.write( "and begin driving at a constant speed. After driving 120 miles you have 12 gallons in your tank. After driving 220 miles \r<BR>\n" );
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document.write( "you have 8.66 gallons in your tank. Assume the relationship is linear. a. Find a function that models this situation.  \r<BR>\n" );
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document.write( "(Input miles driven and output gallons of gas in your tank.) <BR>\n" );
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document.write( "According to the condition, the car spends 12-8.66 = 3.33 gallons per 220-120 = 100 miles,  or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.33%2F100 ALIGN=MIDDLE  ALT=\"3.33%2F100\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 0.0333 gallons per mile, \r\n" );
document.write( "or,  which is the same, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F0.0333 ALIGN=MIDDLE  ALT=\"1%2F0.0333\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 30 miles per gallon.\r\n" );
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document.write( "b. How many gallons does your gas tank hold when full?    It holds 12 + 0.0333*120 = 15.996  = about  16  gallons when full.\r\n" );
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document.write( "c. How many miles can you drive before you will run out of gas?  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16%2F0.0333 ALIGN=MIDDLE  ALT=\"16%2F0.0333\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 480 miles (approximately).\r\n" );
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document.write( "d. What is your car’s approximate fuel efficiency in miles per gallon?   30 miles per gallon, as I calculated it above.\r\n" );
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