Which relations are a function?

Question

{(-6,2),(7,2),(6,-3)} {(-1,2),(7,1)(0,-3)} {(-6,2),(7,1),(0,-3)}

Answer 1

this is the first one:
we know the rule: y=kx
now plug the values we are given into the rule that we know: 2=-6k
2 dividedby -6 and -6k dividedby -6 (because you want to get k alone)
-0.3=k

now that we know the value of k we can solve the problem with the rule

y=kx, therefor 2= -0.3(-6)

now look at x, which is valued as -6
you can see that nothing comes after it, it is at the end of the function rule, therefor it is a function

if there is anything after x that means it is not a variable

now that iv completely explained this to you im sure you will have no trouble doing the rest on you own

i better get of the computer and do my math homework. lol. im doing the same kinds of problems.

Answer 2

I agree with the first answer. They are all functions because none of the x coordinates are the same. The y coordinates can be the same and it will still be a function.

Answer 3

All of them are functions, because in each
relation, no 2 ordered pairs have the same
first element.