Question

Which relations are functions?

Select Yes or No for each relation.

(2, 2), (3, 3), (4, 4), and  (5, 5) A. Yes B. No

(1, 2), (1, 3), (1, 4), and (1, 5) A. Yes B. No

(2, 1), (3, 1), (4, 1), and  (5, 1) A. Yes B. No


​(2, 2), (2, 3), (5, 4), and  (5, 5) A. Yes B. No

Answer 1

if they have 2 different y responses for the same x variable it cannot be a function

Answer 2

so in that case 1 is a linear function so yes
2- not a function because it has 4 different y variables for 1 x variable which also signifies it is a vertical line. (undefined)
3-Yes it is a function because despite all the points having the same y variable since they have different x varaibles it is a function.
4- not a function because it contains the first two points and the last 2 points have 2 x axises with different y variables :D

so in short
1-yes
2-no
3-yes
4-no

Answer 3

Thanks so much ^.^

Answer 4

np ;D