Inverse

(1)    Reflect  the function  about the y axis

(2)    Rotate the graph of (1)     90°  clock-wise

This will be the inverse 

First one  :  https://www.desmos.com/calculator/f34fdy3pga

Second one :  https://www.desmos.com/calculator/i1l4bgsjmp

Third one :   https://www.desmos.com/calculator/exbmqsekow

Last one : https://www.desmos.com/calculator/pqzzmgj0gg