Step-by-step explanation:
<u>Relation </u><u>1</u><u> </u><u>:</u><u>-</u><u> </u>
For each different inputs we don't have distinct outputs . As in 2nd and 4th . So it's not a function .
Not a function
<u>Relation</u><u> </u><u>2</u><u> </u><u>:</u><u>-</u>
For same inputs we have distinct outputs . So it's not a function .
Not a Function
<u>Relation</u><u> </u><u>3 </u><u>:</u><u>-</u><u> </u>
For each different inputs we don't have distinct outputs . As in 2nd and 1st . So it's not a function .
Not a function
<u>Relation</u><u> </u><u>4</u><u> </u><u>:</u><u>-</u><u> </u>
For same inputs we do have distinct outputs . So it's not a function .
Not a Function