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!

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.