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algebra intermediate
Problem
Graphs of several functions are shown below. Which functions have inverses?
Enter the letters of the graphs of the functions that have inverses, separated by commas.
Enter the letters of the graphs of the functions that have inverses, separated by commas.
Solution
Given the graph of a function, the function has an inverse only when every horizontal line intersects the graph at most once. Thus, the only graphs where the functions have inverses are
Final answer
\text{B,C}