Question

Which of the sets of ordered pairs represents a function? (5 points) A = {(1, −5), (8, −5), (8, 7), (2, 9)} B = {(7, −4), (7, −2), (6, −3), (−9, 5)}

Answer 1

Answer:None

Step-by-step explanation:

For any function,any point in the domain has a unique image in the codomain.

For set $A$:

$f(8)=-5$ from the point $(8,-5)$

$f(8)=7$ from the point $(8,7)$

For a same point $8$,there are two images.

So,$A$ does not represent a function.

For set $B$:

$f(7)=-4$ from the point $(7,-4)$

$f(7)=-2$ from the point $(7,-2)$

For a same point $7$,there are two images.

So,$B$ does not represent a function.