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is {(-5, -1), (5, -1), (2, -1)} a function
Note:
The function y = f(x) is a function if it passes the vertical line test. It is a one-to-one function if it passes both the vertical line test and the horizontal line test.
in your case, ordered pairs represents a function because no matter what input you give it gives the same output
this kind of function is usually written as , and your is , and called a function
