Question

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

Answer 1

for each x value we should have only one value for y
so look for a pair that contains x value two time and two different y values

Answer 2

2 and 3 idk

Answer 3

why 2 ?

Answer 4

because its a y

Answer 5

let's look at number one
{(-1,2),(3,-2),(0,1),(5,2)}
x values are: -1,3,0,5 non repeated so it is a function
but number three
{(-1,2),(3,-2),(0,1),(3,5)}
x values are: -1,3,0,3 3 is repeated now look at the y values for 3 they are -2,5 and that is impossible for one value of x there must one value of y

Answer 6

ow i c, so whats next?

Answer 7

it is done the right answer is the third set

Answer 8

thanks