Draw two graphs in the one coordinate system

[marubeni]

Hi everyone. I have a problem that i can't solve it, i need someone fix it for me.

I have to draw two graph in one coordinate system, but only the second graph is displayed. the first graph is not, i don't know why it's not displayed.

i attach the zip files in post, this two graphs is on the page 20. Thank you very much ! 

[AlanStevens · Accepted solution]

Your first parameter has an enormous range of values (including some imaginary numbers!).  Double click on the graph, select the "Traces" tab, scroll across to "Type", click on the word "lines" for the first trace and select "draw".

See attached.

Alan

[marubeni]

Thank you very much, my teacher !