document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=173784>Question 173784</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Your cell phone plan charges you $.02 to send a text message and $.07 to recieve a text message. You plan to spend no more than $5 a month text messaging.<BR>\n" );
document.write( "a. Write an equation in standard form that models the possible combinations of sent text messages and received text messages.<BR>\n" );
document.write( "b. Graph the equation from part (a). Explain what the intercepts of the graph mean in this situation.<BR>\n" );
document.write( "c. List three other possible combinations of the number of messages you can send and receive. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #128712 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=128712\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your cell phone plan charges you $.02 to send a text message and $.07 to receive a text message. You plan to spend no more than $5 a month text messaging.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "a. Write an equation in standard form that models the possible combinations of sent text messages and received text messages.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let x = messages received<BR>\n" );
document.write( "let y = messages sent<BR>\n" );
document.write( ":<BR>\n" );
document.write( ".07x + .02y = 5<BR>\n" );
document.write( ":<BR>\n" );
document.write( "b. Graph the equation from part (a). Explain what the intercepts of the graph mean in this situation.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "convert equation to the general form<BR>\n" );
document.write( ".02y = 5 - .07x<BR>\n" );
document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2F.02 ALIGN=MIDDLE  ALT=\"5%2F.02\"   DISABLED_style= \"max-width:90%; height:auto;\" > - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.07%2F.02 ALIGN=MIDDLE  ALT=\".07%2F.02\"   DISABLED_style= \"max-width:90%; height:auto;\" >x<BR>\n" );
document.write( "y = 250 - 3.5x<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Plot these two points<BR>\n" );
document.write( " x | y<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "20 |180<BR>\n" );
document.write( "60 | 40<BR>\n" );
document.write( "Your graph should look like this:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-10%2C+90%2C+-100%2C+300%2C+250-3.5x%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+200%2C+-10%2C+90%2C+-100%2C+300%2C+250-3.5x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Note: y axis are the no. messages sent, x axis are the no. of messages received<BR>\n" );
document.write( ";<BR>\n" );
document.write( "The y intercept (250) means only sent messages, none received (x=0) <BR>\n" );
document.write( "The x intercept, approx 71 messages received, none sent (y=0)<BR>\n" );
document.write( ":<BR>\n" );
document.write( ":<BR>\n" );
document.write( "c. List three other possible combinations of the number of messages you can send and receive.\r<BR>\n" );
document.write( "\n" );
document.write( "you can do this;<BR>\n" );
document.write( "You can get the approximate x/y values from the graph or; <BR>\n" );
document.write( "To be exact, choose a value for x and find y in the above equation<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Did this make sense to you. Any questions?  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );