B burt Junior Member Joined Aug 1, 2019 Messages 203 Apr 1, 2020 #1 This picture shows both the question and the work I've done so far. I'm pretty confident with my partial derivatives, but how do I draw the traces? These are my attempts - done with geogebra, but is this how to do it?

This picture shows both the question and the work I've done so far. I'm pretty confident with my partial derivatives, but how do I draw the traces? These are my attempts - done with geogebra, but is this how to do it?

Cubist Full Member Joined Oct 29, 2019 Messages 442 Apr 3, 2020 #2 In GeoGebra try the Curve command (click). For the y=0 trace z = sqrt(x^2+0^2) = abs(x), therefore use this command Curve(t, 0, abs(t), t, -6, 6) you need to introduce a parameter, in this case "t", and specify its range.

In GeoGebra try the Curve command (click). For the y=0 trace z = sqrt(x^2+0^2) = abs(x), therefore use this command Curve(t, 0, abs(t), t, -6, 6) you need to introduce a parameter, in this case "t", and specify its range.

B burt Junior Member Joined Aug 1, 2019 Messages 203 Apr 5, 2020 #3 Cubist said: In GeoGebra try the Curve command (click). For the y=0 trace z = sqrt(x^2+0^2) = abs(x), therefore use this command Curve(t, 0, abs(t), t, -6, 6) you need to introduce a parameter, in this case "t", and specify its range. Click to expand... Cool thanks!

Cubist said: In GeoGebra try the Curve command (click). For the y=0 trace z = sqrt(x^2+0^2) = abs(x), therefore use this command Curve(t, 0, abs(t), t, -6, 6) you need to introduce a parameter, in this case "t", and specify its range. Click to expand... Cool thanks!