A distribution of values of a discrete variate represented graphically by plotting points 
,
, ..., 
, and drawing a set of straight line segments connecting
adjacent points. It is usually preferable to use a histogram
for grouped distributions.
Frequency Polygon
See also
Frequency Curve, Frequency Distribution, Histogram, OgiveExplore with Wolfram|Alpha
References
Kenney, J. F. and Keeping, E. S. "Frequency Polygons" and "Cumulative Frequency Polygons." §2.3 and 2.6 in Mathematics of Statistics, Pt. 1, 3rd ed. Princeton, NJ: Van Nostrand, pp. 24-25 and 28-29, 1962.Referenced on Wolfram|Alpha
Frequency PolygonCite this as:
Weisstein, Eric W. "Frequency Polygon." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/FrequencyPolygon.html