document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=266106>Question 266106</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a. What is the slope of the line of best fit? Use the points (1991, 230) and (1997,350). Show your work. <BR>\n" );
document.write( "b. What is an equation for the line of best fit? Use the point (1991,230). Show your work. \r<BR>\n" );
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document.write( "c. According to your equation, what were the sales in 2000? Show your work. (5 points) (Points :5)<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 #195616 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=195616\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a. What is the slope of the line of best fit? Use the points (1991, 230) and (1997,350). Show your work.<BR>\n" );
document.write( "Use the slope formula: m = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y2-y1%29%2F%28x2-x1%29 ALIGN=MIDDLE  ALT=\"%28y2-y1%29%2F%28x2-x1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Assign the given values as follows<BR>\n" );
document.write( "x1 = 1991; y1 = 230<BR>\n" );
document.write( "x2 = 1997; y2 = 350<BR>\n" );
document.write( "The slope<BR>\n" );
document.write( "m = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28350-230%29%2F%281997-1991%29 ALIGN=MIDDLE  ALT=\"%28350-230%29%2F%281997-1991%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=120%2F6 ALIGN=MIDDLE  ALT=\"120%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 20 is the slope<BR>\n" );
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document.write( "b. What is an equation for the line of best fit? Use the point (1991,230).<BR>\n" );
document.write( "Use the point/slope formula y - y1 = m(x - x1)<BR>\n" );
document.write( "y - 230 = 20(x - 1991)<BR>\n" );
document.write( "y - 230 = 20x - 39820<BR>\n" );
document.write( "y = 20x - 39820 + 230<BR>\n" );
document.write( "y = 20x - 39590; is the equation<BR>\n" );
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document.write( "c. According to your equation, what were the sales in 2000?<BR>\n" );
document.write( "Substitute 2000 for x in the above equation<BR>\n" );
document.write( "y = 20(2000) - 39590<BR>\n" );
document.write( "y = 4000 - 39590<BR>\n" );
document.write( "y = 410; sales in 2000 </SPAN>\n" );
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