First, divide a short segment of the drawn mathematical line graph into several segments. The formula can be used to calculate the total number of fragments. For example, if a line segment is divided into five segments, the number of bus segments is (1+5)×5÷2= 15 segments; If a line segment is divided into 6 segments, the total number of line segments is (1+6)×6÷2=2 1 segment; Therefore, the total number of mathematical line segment graphs is regular: ① Find the longest line segment and divide it into several parts, assuming it is n parts; ② The number of bus segments (1+n)n÷2 can be calculated by substituting into the formula.