HEY i need helpp and thank u

Relation 1- function

Relation 2- not a function

Relation 3- Function

Relation 4- not a function

Step-by-step explanation:

Steps my teacher taught us to find a function were to first see if there are x values that repeated like in relation 4 you see y repeated 3 times making it not a function. the rule is that you can many x going to one y, but not many ys going to one x. it's kinda hard to explain so I hope it made sense!

step-by-step explanation:

there are 36 inches in a yard

25 : 36 = 0.69 yards (you can round to 0.70)