Question

Which set of ordered pairs in the form of (x,y) does not represent a function of x?
a. {(-1,2), (3,-2), (0,1), (5,2)}
b. {(-1,2), (3,2), (-2,2), (0,2)}
c. {(-1,2), (3,-2), (0,1), (3,5)}
d. {(-1,2), (2,3), (3,-2), (-2,0)}

Answer 1

the relation which is not a function will have duplicate x values.

eg (1,2) (-1,-2),(1,-1) is not a function because of the 2 1's.

Answer 2

im thinking its set d.

Answer 3

examine each of the 4 ordered pairs and you find a duplicate x value.

Answer 4

not d

Answer 5

-1, 2 , 3 and -2 are all different.

Answer 6

okay.. hm so a then?

Answer 7

dony worry about the y values just check the x's.

Answer 8

what are the x values in option a?

Answer 9

-2, 3, 0, 5

Answer 10

sorry -1

Answer 11

so its not a

Answer 12

no duplicates there

Answer 13

c.... because -1, 3, 0, 3

Answer 14

two 3's

Answer 15

correct There are 2 3's.

Answer 16

got it now. thx!

Answer 17

yw
duplicate values of y are allowed but NOt duplicates of x.