## meggy 2 years ago Which of the following relations is a function? A. { (1, 2), (1, 3), (1, 4), (1, 5) } B. { (1, 3), (2, 3), (4, 3), (9, 3) } C. { (5, 4), (-6, 5), (4, 5), (4, 0) } D. { (6, -1), (1, 4), (2, 3), (6, 1) }

1. fiedster23

A function is when no input repeats which means no x coordinate can go to more than one y. So which one has a relation where the x doesn't repeat?

2. fiedster23

There's only one choice where this happens!

3. meggy

yep no clue what or how tto do this

4. fiedster23

In an ordered pair the first number is x and the second is y. So, if I have an ordered pair of (2,6). x is 2 and y is 6. Now look at your choices. the only relation that an x doesn't repeat is choice B, because your x's are: 1,2,4,9.

5. jasonxx

D, plot is on graph and you will get answer

6. meggy

so is the answer d or b

7. meggy

so is the answer d or b

8. meggy

so is the answer d or b

9. fiedster23

D is wrong It is B. I am a math teacher!

10. fiedster23

vertical line test also proves what I'm saying. If you plot the points and draw vertical lines through each point. Then each line should only go through one point. More than one point makes it NOT a function and if you graph D a vertical line would go through x at 6 twice which proves D is WRONG!

11. jasonxx

i dont know neither do i care yor a teacher or what, plot thes points on paer and get yor answer

12. fiedster23

Learn to plot points correctly and know what a function is.

13. meggy

well same thing for thois one { (2, 6), (3, 9), (4, 2), (3, 6) } B. { (2, 8), (3, 6), (2, 4), (0, 2) } C. { (3, -2), (4, 7), (-2, 5), (-4, 5) } D. { (4, 7), (-2, 5), (1, 3), (-2, 1) }

14. jasonxx

lol thanks thats wat ma concern is plot it first

15. fiedster23

Meggy if you ask your math teacher he will confirm what I'm saying! Answer is C on the second one. Same answer as above. Hope that helps.

16. meggy

oook and im online schooling i dont have teachers

17. jasonxx

ya can put yor questions here and everyone can help ya to figure out

18. meggy

Marty has a standard deck containing 52 cards. If Marty takes one card from the deck, what is the probability that he will select a king of hearts?