Question

Which of the sets of ordered pairs represents a function?

A = {(3, –5), (4, 6), (–3, 9), (2, 7)}

B= {(2, 4), (–1, –7), (5, 6), (4, 3)}


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

Answer 1

@GabeBae

Answer 2

Which one(s) fit(s) the definition?

1) Single x-value
2) Multiple y-values
3) Bad!

Answer 3

i don't know????

Answer 4

Have you considered looking at the data? Any repetition amongst the x-values?

Answer 5

Have you considered plotting the points and applying the Vertical Line Test?

Answer 6

Ok so would it be A?

Answer 7

You tell me. What are you thinking? Why do you believe it is "A"?

Answer 8

I actually think it is B because it does not have the same x value

Answer 9

Neither does A

Answer 10

In a list like this, there are two things:

1) No repeats of 'x'. It IS a function.
2) If there ARE repeats of 'x', it may still be a function of all the corresponding y-values are the same.

Yes (1,2)(2,4)
No (1,2)(1,3)
Yes (3,5)(3,5)

Answer 11

ok so it is neither A or B right?

Answer 12

A: http://i.imgur.com/A3xUqJY.png
B: http://i.imgur.com/5k79Cqd.png

Answer 13

Use these images and the vertical line test.

Answer 14

"In mathematics, the vertical line test is a visual way to determine if a curve is a graph of a function or not. A function can only have one output, y, for each unique input, x."

Answer 15

so is it B?

Answer 16

Why do you keep throwing darts?

Neither has a repetitive x-value. They are both functions.