Question

Which of the sets of ordered pairs represents a function?

A = {(–5, 5), (–2, 2), (2, –2), (5, –5)}

B = {(4, 2), (3, –2), (9, 4), (11, –3)} (4 points)


Only B
Both A and B
Neither A nor B
Only A

Answer 1

A function should pass the vertical line test.
That is, the same x value should not have two or more different y-values.
A = {(–5, 5), (–2, 2), (2, –2), (5, –5)}
The x-values are: -5, -2, 2, 5. They are all different. So the same x-value does not give two different y-values. So this is a function.
Try the same logic for B.

Answer 2

im guessing its only A

Answer 3

For example, P = { (1, 5), (2, 8), (1, 10) } is NOT a function.
The first pair, (1,5), says when x = 1, y = 5
The last pair, (1, 10), says when x = 1, y = 10.
So the same value of x = 1 gives two different y-values: 5 and 10.
This is NOT a function.

Answer 4

so its not A

Answer 5

A = {(–5, 5), (–2, 2), (2, –2), (5, –5)}
The same x-value does not give two different y-values.
All four x-values are different and so there is not possibility of the same x-value giving two different y-values. Therefore, this is a function.

B = {(4, 2), (3, –2), (9, 4), (11, –3)}
The same x-value does not give two different y-values.
All four x-values are different and so there is not possibility of the same x-value giving two different y-values. Therefore, this is also a function.

Answer 6

OH SO ITS BOTH A AND B!!!

Answer 7

@aum

Answer 8

is this right?

Answer 9

Yes, both A & B.