Answer:
 (22) = 7
 (22) = 7
Step-by-step explanation:
The inverse function maps the output of the function back to its input
f(7) = 22 means when input is 7 the output is 22
The inverse maps the output 22 back to the input 7 , that is
 (22) = 7
 (22) = 7
 
        
             
        
        
        
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On the graph, it's shown that the function has two real roots. This means that there will be two solutions. So the answer is 1. {0,4}