Bar chart curve plotter is used in statistics teaching

The utility model relates to a bar chart curve plotter is used in statistics teaching, including L type drawing assistance board, drawing rule, L type drawing assistance board includes diaphragm and vertical plate, the drawing rule includes a transverse ruler and two linear foots, the transverse ruler back is provided with the sucking disc, the sucking disc height equals interval between the transverse ruler back and the diaphragm back, it has flexible groove to run through between the last downside of transverse ruler, chi in the middle of a flexible inslot is provided with, middle the chi is scalable arranges flexible inslot in, and one end arranges in between the linear foot of both sides, and transverse ruler upper portion is arranged in to the other end, be provided with the scale mark on the middle chi, run through between the downside on the diaphragm and be provided with a plurality ofly and the corresponding logical groove of both sides linear foot, the linear foot is scalable arranges logical inslot