Frequency is the number of cycles per second represented in Hertz (Hz). The wavelength is the measure of the length of the wave (measured from peak to peak most commonly). In optics, wavelength determines the color of light, where frequency places it where it belongs in the electro-magnetic spectrum (i.e. infrared, ultraviolet, or visible to human eye).
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The difference between frequency polygon and line graphs is their purpose. Frequency polygons are for understanding shapes distributions, while line graphs shows information that is related in some way.
Relative frequency is a method of calculating the frequency of an event. Percentage frequency is a way of presenting the frequency of an event.
The pieces of a pie chart represent the parts of a whole, as does relative frequency. The total of the entire pie chart should be 100% or 360 degrees. The sum of the relative frequencies should also equal 100%.
frequency density = frequency/group width
the frequency is less than OR EQUAL TO the cumulative frequency