adding lines to a chat

[Guest]

How do I add a vertical line in a graph, that begins at the x-axis and continues to the upper limits of my graph? I need this line to cross a plotted logarithmic curve and display the y-axis value of the intersection of the vertical line and my logarithmic curve. This graph is to find the Liquid Limit of a soil sample. My x-axis(log scale) is the number of blows in the test (integer values), and my y-axis is moisture content(%). The vertical line would be where the numberofblows =25, which is defined as the liquid limit.

 

[Tom Ogilvy]

Some sources for adding lines to charts
http://andypope.info/charts/averageline.htm
http://www.andypope.info/ngs/ng25.htm
http://www.tushar-mehta.com/excel/charts/straight_lines/index.html
http://peltiertech.com/Excel/Charts/DummySeries.html#AddLine

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regards,
Tom Ogilvy

How do I add a vertical line in a graph, that begins at the x-axis and

continues to the upper limits of my graph? I need this line to cross a
plotted logarithmic curve and display the y-axis value of the intersection
of the vertical line and my logarithmic curve. This graph is to find the
Liquid Limit of a soil sample. My x-axis(log scale) is the number of blows
in the test (integer values), and my y-axis is moisture content(%). The
vertical line would be where the numberofblows =25, which is defined as the
liquid limit.