How to animate charts in Keynote

Hello i am Jake Gartside, I have been looking at the keynote to try and answer you question, I am new to the discussions so i hope that my information is relavent to you, ok the fist step is to creat a chart, in your case a line chart, select the line chart, the go to the inspector, then click on build inspector, Ok click on build in (Not build out) then go to the scroling bar, a little underneth, on that sellect thean effect wipe, affter go the scrole that is labeld dilivery, select (by series), and ther you are you have a bar chart that comes in is series.

I'm not sure EXACTLY what you're looking for but I don't think you can do what you want to do directly using the charting features in Keynote. You MIGHT be able to fake it with shapes and the clever use of builds, though.

Have you checked to see if the "By Set" option available for chart builds does what you want? It will create a line graph segment by segement.

If you want more continuous motion, you can fake up a moving line using a horizontal wipe. Create two charts, both with the same axes. One should be "blank", with no values (and therefore no line). The other should have the data you want to show. Align the charts so that the blank chart is below the data chart. Have the blank chart appear on the slide first. The critical part is then to build in the second chart using a left-to-right wipe. The line will appear to progress across the chart.