Melody

Cycle re-ask:

Yes, they are very hard questions and I understand that it may be unreasonable for your educator to give them to you.

BUT

They are not meant to be easy.  Have you seriously tried to learn from the answers that you have already been given?

If they are really way too hard for you it is better that you do not answer them. 

Explain to your teacher that they are way too hard and you do not have a clue how to do them.

Your teacher cannot give you appropriate level work if you keep answering (by cheating) and she/he thinks that you can do these ones.

Have you tried this question for yourself?

There have been a lot of similar questions asked lately and a number of them have answers.

I expect that they were all asked by you or your classmates.

Have you worked through the answers that are given?

This has been answered by EP. 

Hi Jenny,

This is almost exactly the same as the one I just answered for you.

Can't you copy the technique and try it for yourself?

Give it a go    

No not all 4

You have a history of posting copyrighted material.  I expect this is more of that.

What does linear mean?  If you do not know, google it.

Gradient is rise over run.  There would be a multitude of sites and youtube clips explaining this. 

I'm quite sure you can attempt this question on your own.

Use this to find your answer

I set up two equations, each with r and theta then I solved them simultaneously.

I only needed r so you can eliminate theta.

You are very welcome.