Question

question 7 of 20
which conic section does the equation below describe?
$(x + 1)^2+(y - 3)^2=4$
a. circle
b. hyperbola
c. parabola
d. ellipse

Explanation:

The standard form of a circle's equation is $(x - a)^2+(y - b)^2 = r^2$, where $(a,b)$ is the center and $r$ is the radius. The given equation $(x + 1)^2+(y - 3)^2 = 4$ is in this form with center $(-1,3)$ and radius $2$.

Answer:

A. Circle