# Immediate HELP! For any point A(x,y) of a locus

1. Mar 24, 2005

### aisha

For any point of a locus, the sum of the squares of the coordinates is 9 determine the equation of the locus. And draw a diagram.

I can only think of the obvious x^2+y^2=9 ?

Can someone plz help me quick!

2. Mar 24, 2005

### whozum

Thats correct.

3. Mar 24, 2005

### aisha

are you sure? What should the diagram look like? I have a circle with a line called r for the radius and a point on the circle labelled P(x,y) and the center (0,0) thats it? What else?

4. Mar 24, 2005

### Data

Circle of radius 3 centered at the origin, of course.

5. Mar 24, 2005

### whozum

Can you think of any point whos coordinates squared dont lie on that line?

We can get into a whole bunch of trig to prove it if you'd like :)

6. Mar 24, 2005

### aisha

ok I hope this answer is correct Im going to submit it. OK OK I BELIEVE U THANKS SOO MUCH last assignment question seemed cheezy just wanted to make sure b4 i handed it in thanks soo much

Last edited: Mar 24, 2005