Question

A small messenger company can only deliver within a certain distance from their office. On the graph below, the circular region represents that part of the city to which the company delivers and the dot at the center of the circle represents the office. Which equation represents the boundary for the region where the company can deliver?

Answer 1

what's the center of this circle?

Answer 2

I think 3,1

Answer 3

close, (-3,1)

Answer 4

how about the radius?

Answer 5

that's what I thought but wasn't sure. and not sure

Answer 6

well the diameter is 14 units (measure from tip to tip along the center line of the circle)

so the radius is ???

Answer 7

7?

Answer 8

good

Answer 9

so we know that h = -3, k = 1, r = 7

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

(x-(-3))^2+(y-1)^2=7^2

(x+3)^2+(y-1)^2=49

Answer 10

got it! thanks!!

Answer 11

you're welcome