Bob makes $15 per hour. He can create an equation to find his salary, y, for total hours worked, x, with the following equation: y = 15x. Which statement says that y is a function of x?

Group of answer choices

For some values of y, there is more than one value of y.

For every value of x, there is only one value of y.

For every value of y, there are two values of x.

For some values of y, there is more than one value of x.

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