The ordered pair (-4,3) is located on a circle in the coordinate plane given by the equation (x+1)^2 + (y+1)^2 = r^2. If r is the radius of the circle, which of the ff points must also lie on the circle?

a. (-6,-2.8)
b. (-3.9,2)
c. (1,2.7)
d. (-1,-4)
e. (2,3)

Question

The ordered pair (-4,3) is located on a circle in the coordinate plane given by the equation (x+1)^2 + (y+1)^2 = r^2. If r is the radius of the circle, which of the ff points must also lie on the circle?

a. (-6,-2.8)
b. (-3.9,2)
c. (1,2.7)
d. (-1,-4)
e. (2,3)

anonymous · Answer

From the given point you can compute r

anonymous · Answer

$$(-4+1)^2 + (3+1)^2 = r^2\
9+16=r^2\
r=5
$$

anonymous · Answer

It seem obvious (2,3) on the circle
$$
 (x+1)^2 + (y+1)^2 = 25\
(2+1)^2 + (3+1)^2 = 25\
3^2 +4^2=25
$$

anonymous · Answer

thank youuu c:

anonymous · Answer

YW