Identify whether the equation, when graphed, will be a parabola, circle, ellipse, or hyperbola.
-$x ^ { 2 } + y ^ { 2 } = 81$
A) parabola
B) circle
C) ellipse
D) hyperbola

Question

Quizplus · Accepted Answer

The equation $x^2 + y^2 = 81$ represents a circle with a radius of 9, centered at the origin (0,0), because it is in the form $x^2 + y^2 = r^2$, where $r$ is the radius.

Identify Whether the Equation, When Graphed, Will Be a Parabola x2+y2=81x ^ { 2 } + y ^ { 2 } = 81x2+y2=81

Identify Whether the Equation, When Graphed, Will Be a Parabola $x ^ { 2 } + y ^ { 2 } = 81$