Question

Find the equation of the circle with center at (-3, 1) through the point (2, 13)

Answer 1

do you know the standard equation for a circle?

Answer 2

(x+h)^2 + (y-k)^2 = r^2

Answer 3

Correct?

Answer 4

everythings right except that it should be x-h, not +

Answer 5

Oh okay, thank you

Answer 6

yea. just plug in what you know and you should be able to solve for r

Answer 7

How do I find the radius from the two points though?

Answer 8

plug in your given points (2,13) into x and y respectively

and your center (-3,1) into h and k, respectively

Answer 9

oh! Thank you so much

Answer 10

no problem