Re: Why gives Plot[GTK,{q,o,30}] negat. min. at q=15 ? (GTK:=1/3 q^2 - 10 q + 100)
- To: mathgroup at smc.vnet.net
- Subject: [mg2202] Re: [mg2170] Why gives Plot[GTK,{q,o,30}] negat. min. at q=15 ? (GTK:=1/3 q^2 - 10 q + 100)
- From: Lou Talman <me at talmanl.mscd.edu>
- Date: Mon, 16 Oct 1995 11:52:22 -0400
Read the scale on your vertical axis, Jan. --Lou Talman Begin Forwarded Message: Say GTK = ATC = Average Total Cost := 1/3 q^2 - 10 q + 100 When I give Plot[GTK,{q,0,30}] the resulting graph gives a minimum below to X-axis at aboutq=15 When I give q=15 and N[GTK] it evaluates correctly to GTK=25. What am I doing wrong ? Thanks for any effort you take ! ------------- GMT 16.15 Jan Holland txp at pi.net "A fact is a broken dream"