The cost of sending cell phone picture is given by y=0.5x, where x is the number of pictures that you send and y is the cost in dollars. a. Write the equation in function notation. interpret the function in terms of the context.
b. Find f(5) and f(12). What do these values represent?
c. Determine the domain and range of this function.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

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