Question

Which of the following relations is a function?

(4, 0), (-2, 3), (9, 1), (-2, 5)

(9, 1), (-2, 4), (4, 1), (9, 2)

(4, 4), (-2, 6), (4, 3), (-7, 2)

(4, 4), (-2, 2), (9, 1), (-7, 2)

Answer 1

@AriPotta

Answer 2

To be a function, each x value must map to only 1 y value

Answer 3

sa B

Answer 4

B has the two points (9,1) and (9,2) the x value of 9 maps to 2 different numbers , 1 and 2

Answer 5

so that is not a function

Answer 6

so which one is it

Answer 7

Which one has 4 different x values?

Answer 8

(x,y), (x1,y1) , (x2,y2) , (x3,y3)

none of those x values can be the same number.

Answer 9

so its A @DanJS

Answer 10

Following the rule i stated above,

a) has points (-2 , 3) and (-2 , 5)

Answer 11

i dont now

Answer 12

2 of the x values are the same

Answer 13

a point is (x , y) if any of the numbers in the x place is pictured more than once in any of the answers, then it is NOT a function.

Answer 14

ohh its D

Answer 15

Each answer has 4 points (x , y) find the one that doesnt have duplicate values in the x spot

Answer 16

yes!

Answer 17

thx