数学中的函数关系主要有正比例函数、反比例函数、一次函数、二次函数等,而初中物理中的物理量函数关系常常涉及上述几种情形.这些物理量函数关系式的确定方法一般是:(1)根据题目中提供的信息(数据或图象等),初步确定属于哪一类函数关系; Functions in mathematics mainly include positive proportional function, inverse proportion function, first-order function, second-order function, etc. The relationship between the physical quantities in junior middle school physics often involves the above situations. The determination of these physical function formulas is generally as follows: (1) According to the subject provided information (data or images, etc.), initially determine which type of functional relationship;