Which of the following sets of ordered pairs in the form (x, y) represent a function of x? 3 points {(2,4), (-2,4), (5,3), (7,4)} {(3,,,2), (-6,2)} {(9,2), (-3,4), (-3,1), (7,-4)} {(5,,-,-4), (6,1) show work

Option A is right.

Step-by-step explanation:

For answering this question we must understand what is a function.

A function is different from mapping.

Mapping is just a subset of AxB where A and B are two sets.

But function is constrained to the point that elements of I set will have unique image in second set.

We find From the options

in option A, each of 2,-2, 5 and 7 have unique images.  Hence it is a function.

But in option B,, we find that 3 has two images 5 and 2.  i.e. 3 does not have unique image. Hence not a function.

Similarly  in option C,, we find that -3 has two images 4 and 1.  i.e. -3 does not have unique image. Hence not a function

and  in option D,, we find that 5 has two images 1 and -4.  i.e. 5 does not have unique image. Hence not a function.

Only first option is a function.

2x^2+5x+17

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