Someone before me had created a chart with columns and a line, but what I
can't figure out is how they made the line the way it is. When I go to the
Source Data the data series for the line has both an "X Values" and a "Y
Values". When I try to duplicate this in a new chart I only have the option
to enter X Values. Any idea how to get it to give me a space to enter a Y
Value?