Determine which equation has a graph which is a circle. A) 4x² - y² = 1 C) x² + 4y = 1 D) x² + y² = 4

Question

Quizplus · Accepted Answer

The equation x^2 + y^2 = 4 can be rewritten as x² + y² = 4 through completing the square. This is the standard form of the equation of a circle with center at the origin and radius 2. Therefore, choice D has a graph that is a circle. The other choices do not have the form of the equation of a circle.

Determine Which Equation Has a Graph Which Is a Circle