Which of the sets of ordered pairs represents a function?A = {(1, −5), (8, −5), (8, 7), (2, 9)}
B = {(7, −4), (7, −2), (6, −3), (−9, 5)}
Only A
Only B
Both A and B
Neither A nor B
Answers
Answer:
The correct option is 4. Neither A nor B represents a function.
Step-by-step explanation:
The given sets of ordered pairs are
A set of ordered pairs represents a function if there exist unique outputs for all inputs. It means for each values of x there exist, a unique value of y.
In set A the value of y-coordinates are -5 and 7 at .
At x=8, there exist more than one value of y, so the set A is not a function.
In set B the value of y-coordinates are -4 and -2 at .
At x=7, there exist more than one value of y, so the set B is not a function.
Therefore neither A nor B represents a function and option 4 is correct.
Answer:
The answer is D, "Neither A or B."
Step-by-step explanation:
In most cases (including this one), there can only be one input or x-value for every unique output, or y-value. In other words, the x-values cannot repeat themselves. Both (8, -5) and (8, 7) are invalid in ordered pairs A, and (7, -4), and (7, -2) make ordered pairs B unable to represent a function. I also took this test and it was correct.
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