The actual frequency response of your filter is returned by the VI as "filter information". It is a cluster that contains both the magnitude and phase responses of your filter so you can for example unbundle the magnitude cluster and simply pass it to a waveform graph.
You can find more details on the difference between the different filters in the LabVIEW Analysis Concept manual. Go to Start>>Programs>>National Instruments>>LabVIEW x.y>>>Search the LabVIEW Bookshelf. Then in the Concept and Techniques section select the Analysis Concept document (name may vary depending on your LabVIEW version). There you'll find a chapter on Digital Filters.
