初中数学复习：正反比例函数

xyy=kx(kx1k0)(f(x))yxy=kx+bb=0y:y=kx(k)K0()Kyyx.K0()kyxyk0yx();k0yx():;:;(00)(1k)k(kx)0y=kx(k0)k;k1y=kxk2kxyy=k/x(kk0)yxy=k/xXX0y=k/xxy=ky=kx^-1x,yy=k/x(kk0kxyxx0,y0k0k0.kxyxyyxy=kx^-1(kk0x0,x0yxyx0|x|x0,xRRx}k(k0)x0hyperbola,XYy0k0k0xyxy