Question

Will give medal! Determine which set of ordered pairs is a function.

A. {(–1, 3), (1, 4), (–1, 5)}

B. {(5, 3), (–6, 3), (–2, 4)}

C. {(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)}

D. {(1, 2), (–5, 4), (3, 6), (–5, 2)}

Answer 1

it is a function only if the x value are not the same

Answer 2

the domain of these relations are the fist numbers
in the parentheses ( and ).
the range are the second numbers

a function has a relation where 1 member of the domain links with one and only one member of the range ( one to one function)

OR its many - to- one ( two or more members of the domain link with one of the rangge

a On-to-many relation is NOT a function

eg in A: -1 maps to 3 an also maps to 5 (one-to-many) so its nor a relation

Hopes this helps

Answer 3

if you have 2 x values the same is not a function, example A have two x=-1

Answer 4

- right - and -1 maps to 3 and to 5

Answer 5

* A is not a function - I should have said