A certain bank assigns one unique number to each savings account. The amount of savings in each account depends on how much the owner deposits into the account. The interest paid on each account depends on how much money is in the account.

Which of these relations is not a function?

(interest paid, savings account number)

(interest paid, amount in savings account)

(savings account number, interest paid)

(savings account number, amount in savings account)

Question

A certain bank assigns one unique number to each savings account. The amount of savings in each account depends on how much the owner deposits into the account. The interest paid on each account depends on how much money is in the account.

Which of these relations is not a function?

(interest paid, savings account number)

(interest paid, amount in savings account)

(savings account number, interest paid)

(savings account number, amount in savings account)

lena772 · Answer

@SACAPUNTAS How do I chose an answer if the first two are not functions?

lena772 · Answer

I need clarity on this.

anonymous · Answer

I had a moment of stupidity

lena772 · Answer

It's fine, I'm having a few myself tonight.

anonymous · Answer

I think the second one is a function because the idea is each interest payment will only come from one amount. That's not true, people's interest rates can vary, but I think that's the assumption they're expecting you to make.

lena772 · Answer

So the second one isn't a function?

anonymous · Answer

No, the second one IS a function!

lena772 · Answer

The question asks which of the following is not. The first one is NOT, right?

anonymous · Answer

Right. Because multiple accounts can receive the same interest.

lena772 · Answer

Okay thank you so much I'm going to submit this test now. Will you be around to help for a while?

anonymous · Answer

Not really, sorry!

lena772 · Answer

Okay thanks for everything though