document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190625>Question 1190625</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4. The average cost of a 30-second ad during the 1995 super bowl was $1 million, and in 1998 it was $1.3 million.\r<BR>\n" );
document.write( "\n" );
document.write( "a)Find the slope of the line through (1995, 1,000,000) and (1998, 1,300,000) and interpret your result.\r<BR>\n" );
document.write( "\n" );
document.write( "b)Graph the line passing through the points in part a). Be sure to label your units.\r<BR>\n" );
document.write( "\n" );
document.write( "c)Using this model, what is the estimate of the cost of an ad in the 2022 super bowl? Is this amount realistic? Explain. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #822336 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3817)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><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=822336\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "Part A\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The change in cost is 300 thousand (since 1.3 million - 1.0 million = 0.3 million = 300 thousand)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The change in time is 3 years (1998 - 1995 = 3)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The slope is the ratio of the two results:<BR>\n" );
document.write( "(300 thousand)/(3 years) = 100 thousand per year\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The slope is 100,000<BR>\n" );
document.write( "Interpretation: The average cost of a 30-second ad goes up by $100,000 per year.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "---------------------------------------\r<BR>\n" );
document.write( "\n" );
document.write( "Part B\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "I'll let you do this part. The instructions are pretty straight forward. <BR>\n" );
document.write( "Make an xy grid and plot the two points given. Draw a straight line through them.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "I recommend making the y scale increment by units of 100,000.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "Part C\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The gap of time from 1995 to 2022 is 2022-1995 = 27 years.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "If the average cost has gone up by $100,000 per year, then it has gone up by 27*(100,000) = 2.7 million dollars over the course of those 27 years.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Add this to the original price of $1,000,000 in 1995<BR>\n" );
document.write( "1,000,000 + 2,700,000 = 3,700,000\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Answer: 3.7 million dollars<BR>\n" );
document.write( "Is it realistic? I'd assume so but I'm not entirely familiar with actual advertising costs.<BR>\n" );
document.write( "</font> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );