With the help of line graph, students can deepen their understanding of the concept of multiple, solve the practical problem of "how many times is a number" by multiplication, correctly distinguish two kinds of multiple problems, cultivate students' ability to solve problems by applying concepts, and cultivate geometric intuition and model thinking in the process of solving problems.

(2) Process and method

Cultivate students' abilities of observation, analysis, cooperation and communication, language expression and rigorous examination of questions, attach importance to the role of geometric intuition, help students understand mathematics through various intuitive forms, provide students with opportunities to participate in geometric intuitive activities, and accumulate experience in learning mathematics with pictures.