document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=880141>Question 880141</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Pet Care The table shows general guidelines for the weight of a Great Dane at <BR>\n" );
document.write( "various ages..\r<BR>\n" );
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document.write( "Copy & paste the link to see the table : http://prntscr.com/3q2kvg<BR>\n" );
document.write( "THANKS\r<BR>\n" );
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document.write( "a). None of the three models in this lesson—linear, <BR>\n" );
document.write( "quadratic, or exponential—fits this data exactly. <BR>\n" );
document.write( "Which of these is the best model for the data? Explain <BR>\n" );
document.write( "your choice. \r<BR>\n" );
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document.write( "B). What would you predict for the weight of a Great <BR>\n" );
document.write( "Dane who is 1 year old?\r<BR>\n" );
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document.write( "C) . Do you think you could use your model to find the <BR>\n" );
document.write( "weight of a Great Dane at any age? Why or why not?\r<BR>\n" );
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document.write( "please help me show work please, THANK YOU.\r<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 #531248 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=531248\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Not a complete answer yet - but the points appear to be logarithmic.\r<BR>\n" );
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document.write( "The points shown in the hyperlink are (2,12),(4,23),(6,33),(8,40),(10,45), in which first coordinate is months age and the second coordinate is weight.\r<BR>\n" );
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document.write( "Starting with <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=a%2Aln%28x%29%2Bb ALIGN=MIDDLE  ALT=\"y=a%2Aln%28x%29%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" >, forming two equations from the first and last ordered pair, and solving the system, a model found is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=%2820.5%29ln%28x%29-2.21%29 ALIGN=MIDDLE  ALT=\"highlight%28y=%2820.5%29ln%28x%29-2.21%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  This model is good but does not reproduce the point (4,23) nor (6,33) too well.\r<BR>\n" );
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document.write( "Trying a quadratic model, using the points (2,12), (6,33), and (10,45) gave three simultaneous equations.  The resulting coefficients while treating the actual a, b, and c of general form as the variables, fed into the perdue matrix calulator ( http://www.math.purdue.edu/~dvb/matrix.html ), gives <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28y=-0.2813x%5E2%2B7.5x-1.875%29 ALIGN=MIDDLE  ALT=\"highlight_green%28y=-0.2813x%5E2%2B7.5x-1.875%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.   You can check how well this model fits and decide what you think of it.\r<BR>\n" );
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document.write( "That quadratic model appears to reproduce the data points very well... </SPAN>\n" );
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