Hi, I am totally lost while trying to make a line chart.
This is the story:

I have during one week collected CO2 values together with temperature
and the number of people together with the time in the computer
classrom at the school where I work.

I whant to make a line chart where the PPM CO2 is plotted (vertical -
left) and on the horizontal axis is the time, on the other vertical
axis (right side) I want the temperature shown.
The number of people should be plotted as labels or in the horizontal
axis (under the time).

Is this possible?

Best regards
Bertil