A graph of a system of two equations is shown. HELP

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test