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Which of the following is the shape of a cross section of the figure shown below

∆red ≅ ∆ by rule will give brainiest if possible

Which of the following best describes the graph below? + + 2 + 3 + 4 1 o a. it is not a function. o b. it is a one-to-one function. o c. it is a many-to-one function. o d. it is a function, but it is not one-to-one.