①點(diǎn)斜式:y一y0=k(x一xo)最常用
②斜截式:y=kx十b
③長(zhǎng)十步=1axo甜丬X下十都提參數(shù)令參數(shù)失效!失放?→矮0X二㎎十v??????????????????????????????。。?!長(zhǎng)一燈xzmyc