What functions have you learned in junior high school and senior high school? I just reviewed the function recently, and I forgot all the functions in junior high school. I want to ask, help and give them as much as possible. ... Junior high school mainly has elementary functions: Y=KX+B(KB is constant, k is not equal to 0), direct proportional function Y=KX(K is not equal to 0), inverse proportional function Y=K/X(K is not equal to 0, x is not equal to 0), quadratic function y = ax 2+bx+c (a is not equal to 0) and so on.

High school: exponential function Y=a, logarithmic function, trigonometric function, inverse trigonometric function, (power function), conic curve.

But the key is the universal function.