One is more like a line graph and the other is a rectangular graphing system.
- Frequency Polygon
- The difference
There is a huge difference between the two types of graphs. A histogram has many points that are represented by the rectangles. The rectangles are formed by finding the x and y axis points. The top of the rectangle is the x axis. There are many of these little rectangles on the histogram and most of them are color coded to show the different data points.
The Frequency Polygon is just three or four points. For example the 3, 8, 13, and 18 may be graphed, so the line begins at three and goes up to the first point then over to the 8 and on until it reaches the fourth point. At the fourth point the line returns back to the y axis.
You might want to check out Google Images to get a picture of both types of graphs so that you can see how different they look, now that you have a description of the two terms.