I just created a double y-axes line graph that shows Production (Y1) and
Costs (Y2) v. Months (X). I'm trying to make both y axes cross the x-axis at
0 but somehow only the Primary axis does that, leaving the Secondary axis
cutting at a point other than 0. I'm plotting only positive production values
and the cost axis has both positive and negative values.

I'd appreciate any help. Thanks.
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aqua