document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=924912>Question 924912</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A magazine company had a profit of $98,000 per year when it had 32,000 subscribers. When it obtained 38,000 subscribers, it had a profit of $126,500. Assume that the profit P is a linear function of the number of subscribers s.<BR>\n" );
document.write( "(a) Find the function P.<BR>\n" );
document.write( "P(s) =	 (i got 6.125s - 98000) but it said it was wrong\r<BR>\n" );
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document.write( "(b) What will the profit be if the company obtains 50,000 subscribers?<BR>\n" );
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document.write( " i also got 208250 and it said that was wrong too\r<BR>\n" );
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document.write( "(c) What is the number of subscribers needed to break even?<BR>\n" );
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document.write( "and once agin i got 16000 subscribers and got that wrong as well please help. \r<BR>\n" );
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document.write( "The data in the table below show the distance, in feet, a ball travels for various swing speeds, in miles per hour, of a bat.<BR>\n" );
document.write( "Bat speed (mph)	Distance (ft)<BR>\n" );
document.write( "40	201<BR>\n" );
document.write( "45	212<BR>\n" );
document.write( "50	239<BR>\n" );
document.write( "60	274<BR>\n" );
document.write( "70	300<BR>\n" );
document.write( "75	326<BR>\n" );
document.write( "80	332<BR>\n" );
document.write( "(a) Find the linear regression equation for these data. (Round your coefficients to three decimal places. A graphing calculator is recommended.)<BR>\n" );
document.write( "y =   \r<BR>\n" );
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document.write( "(b) Using the regression model, what is the expected distance a ball will travel when the bat speed is 58 miles per hour? (Round your answer to the nearest foot.)<BR>\n" );
document.write( "  ft\r<BR>\n" );
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document.write( "this one im absolutly stuck on and keep getting everything wrong....\r<BR>\n" );
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document.write( "my email is crystalrainstone@yahoo.com  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #561210 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=561210\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  $98,000 per year when it had 32,000 subscribers. When it obtained 38,000 subscribers, it had a profit of $126,500.<BR>\n" );
document.write( "38,000 , 126,000<BR>\n" );
document.write( "32,000,   98,000  m = 28,000/6,000 = 28/6 = 14/3<BR>\n" );
document.write( "y -98000 = (14/3)(x - 32,000)<BR>\n" );
document.write( "y = (14/3)x  - 51,333.33<BR>\n" );
document.write( "f(50) = $182, 000<BR>\n" );
document.write( "..........<BR>\n" );
document.write( "Using Excel Scatter Plot<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=ewatrrr&illustration_name=scatter_11_18.png\">.<BR>\n" );
document.write( "a)  y = 3.992x + 41.041<BR>\n" );
document.write( "b)  F(58) = 240.64 = 241 ft </SPAN>\n" );
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