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How is the number of vertices for a prism related to the name of the prism

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.