Hi everyone, now I know this is easy peasy for you guys - but bear with me! I'll write out the whole question first. Phew! I completely understand parts a and b, but c has confused me a little. I've tried thinking about it (alot!) but I am just unsure as to what approach I need for c. It's only worth a couple of marks, so it should be fairly easy - but I'm not seeing what I need to do! Could you point me in the right direction? Thanks, Sparky
After you graph it, you should get a better picture of what it looks like. From there, it's mainly just plug and play. Insert the values (k is the y value of the center coordinate; center is (h,k)) in the formula and show that it gives the correct result. Then, find where the circle intersects the Y axis (find possible values of 'k'). I hope this helps. Good luck! Regards, Der Strom
Okay, I think I'm understanding this more - but what values are P and C? They are points - not numbers? Sorry if I'm being a bit - slow.
No problem! I got the rest pretty quickly - it was mainly the twisted notation which confused me. It suddenly clicked that CP'2' was the radius squared!