document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=740935>Question 740935</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the gasoline mileage y (in miles per gallon) of a small economy car is related to the velocity v (in miles per hour) by the formula y= -(1/30)v^2 + 2.5v. What is the most economical speed for a long trip? It gives me a graph of some sort with units spaced evenly from 10 to 40, by a factor of 10, on the y-axis and 10 to 70, also by a factor of 10, on the x-axis. I believe that Velocity is the independent variable therefore going on the y-axis and gas mileage is dependent taking up the x-axis. The graph itself is a parabola but I don't necessarily understand what the question is asking me to find. What quantifies a long trip and such. Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #451807 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=451807\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Plot v (velocity) along the x axis and y (mileage in miles per gallon) along the y axis.  This way, you will see that greatest mileage is related to a certain velocity.....usually around 55 mph velocity    :-) </SPAN>\n" );
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