document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=936742>Question 936742</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose the quantity of heat y (measured in calories) that it takes to change ice at 0 degree celsius to water x degree celsius is a linear function of x for 0 < x < 100. For 1 gram of ice, y = 100 when x= 20 and y= 120 when x=40. \r<BR>\n" );
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document.write( "a. Express y as a linear function of x<BR>\n" );
document.write( "b. How many calories does it take just to melt the ice?  </SPAN>\n" );
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document.write( "a) y = x + 80\r<BR>\n" );
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