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Mathswatch question help

Roses.Are.Red

can someone help me on this question? I've been trying but idk the answer to it.

(edited 3 years ago)

Original post by KelsieTaylor

can someone help me on this question? I've been trying but idk the answer to it.

Well, what does "y is inversely proportional to x" mean?

Can you write down an equivalent definition in the form of an equation like y = something where "something" involves x?

Reply 2

Roses.Are.Red

Original post by davros

Well, what does "y is inversely proportional to x" mean?

Can you write down an equivalent definition in the form of an equation like y = something where "something" involves x?

First of all I just want to say thank you for helping me!

And I think the equation is:
y=k/x

Reply 3

davros

Original post by KelsieTaylor

First of all I just want to say thank you for helping me!

And I think the equation is:
y=k/x

That's right :smile:

And they've given you a value of x and the value of y that goes with it, so you can write down an equation that you can rearrange to find k...

Reply 4

Roses.Are.Red

Original post by davros

That's right :smile:

And they've given you a value of x and the value of y that goes with it, so you can write down an equation that you can rearrange to find k...

I wrote that answer(the one that you said was right) but they said it was wrong?

Reply 5

davros

Original post by KelsieTaylor

I wrote that answer(the one that you said was right) but they said it was wrong?

Did you write down y = k / x or did you actually work out the value of k first?

Perhaps the answer they want is the final equation with the actual value of k in it?

Reply 6

Roses.Are.Red

Original post by davros

Did you write down y = k / x or did you actually work out the value of k first?

Perhaps the answer they want is the final equation with the actual value of k in it?

(Sorry for replying so late)

I did it without working k out and it said it was wrong, but I also worked out k and I got 9/7, which I put in my final answer and it also says that it is wrong.

Reply 7

davros

Original post by KelsieTaylor

(Sorry for replying so late)

I did it without working k out and it said it was wrong, but I also worked out k and I got 9/7, which I put in my final answer and it also says that it is wrong.