## mjneedshelp 3 years ago Circle D has a radius of 3 units with center D at (5, -2). Which graph represents circle D?

1. mjneedshelp

2. Sandeez

circles 1 and 3 are definitely out

3. mjneedshelp

ok

4. mysesshou

i say #2 since center is at (5,-2) and the radius is 3

5. campbell_st

its the middle circle...

6. Sandeez

agreed. as for #4, find the midpoint between where the circle crosses the y-axis. and you can see if that's -2 or not.

7. mysesshou

true, #4 is probably at 5,-2, but i think it is too big.

8. Sandeez

what is the midpoint of -9.5 and 5.5?

9. mysesshou

(9.5+5.5 )/2

10. campbell_st

add the two values and have it -9.5 + 5.5 = -4 half of -4 = -2

11. mysesshou

*oops missed typing negative...

12. mjneedshelp

so #4 is the right one

13. mysesshou

but the radius is more than 3

14. Sandeez

oh yeah. i forgot that detail!

15. Sandeez

sorry! well, good to understand how to find the center anyway.

16. mysesshou

that's why the teacher puts multiples that might be right, but there is only one that fits all details :) true. finding center is useful