Question

Check my answer!

Which relation is a function?

A. {(1, 2); (2, 3); (3, 4); (1, 5)}
B. {(1, 2); (2, 3); (3, 4); (2, 5)}
C. {(1, 2); (2, 2); (3, 2); (4, 2)}
D. {(1, 2); (1, 3); (1, 4); (1, 5)}

My answer: C.

Answer 1

right

Answer 2

Yay! Thanks! :)

Answer 3

when y-coordinate in all point is same, the relation is a horizontal line.

Answer 4

Correct, all of the y-values have a unique x-value.

Answer 5

and yes, it is C:)

Answer 6

gO_Od job

Answer 7

Lol

Answer 8

\(\large\color{black}{ (}\) if you connect all points then it is an explicit function (the best)
if you don't, then it is a discrete function. \(\large\color{black}{ )}\)

Answer 9

anyway, ... good work!

Answer 10

Thanks everyone! :D I might have some more questions, can I tag you in them?

Answer 11

yes... I might not be able to respond right away, but I will try:D

Answer 12

Okay! :)

Answer 13

Not that I am good at math, or anything of that sort, but (again) I will certainly try.
...
bye!

Answer 14

yea absolutely right

Answer 15

XD Thanks! @rizzu