Question

please help will give medals and will fan!!!!!!!!!

Answer 1

Which relation is a function?

A.
{(1, 2); (2, 3); (3, 4); (1, 5)}

B.
{(1, 2); (2, 5); (3, 2); (4, 5)}

C.
{(1, 2); (2, 3); (3, 4); (2, 5)}

D.
{(1, 2); (1, 3); (3, 2); (4, 2)}

Answer 2

c

Answer 3

in a function, for each value of x we have only one unique value of y

if you find two pairs with same x but different y , then the set is not a function

Answer 4

for example, in the first set we have (1,2) and (1,5)

so for the same value x=1 , we have two values of y, (2 and 5)
thus it is not a function

Answer 5

and by the way it's not c lol