You should start by looking at the examples that ship with LabVIEW that deal with data acquisition. There's lots of examples there, and many have graphs. There are also separate examples that deal with just graphing, intended to show you how to package data for graphs. To find the example, select the Help -> Find Examples menu item.
Basically, if your data has a uniform dt then you would use a waveform chart or a waveform graph. A waveform chart is like a strip chart recorder (if you know what those are), and displays data in a scrolling manner as it's accumulated. A waveform graph shows a snapshot. If your data does not have a uniform dt then you would need to use an XY chart.
To learn more about LabVIEW it is recommended that you go through the tutorial(s) and look over the material in the NI Developer Zone's Learning Center which provides links to other materials and other tutorials. You can also take the online courses for free.
