How to determine the equation of an ellipse given the eccentricity and major axis

What is the formula for eccentricity in an ellipse?

• e = C - A

• e = A / C

• e = C / A

• e = A * C

Which of the following is NOT needed to write the equation of an ellipse?

• The center of the ellipse

• The length of the major axis

• The orientation of the major axis

• The color of the ellipse

What is the formula used to find b^2 in an ellipse?

• C^2 = A^2 - B^2

• C^2 = A^2 * B^2

• C^2 = B^2 - A^2

• C^2 = A^2 + B^2

If a = 3, what is the value of a^2?

• 3

• 9

• 12

• 6

What is the value of b^2 if C^2 = 4 and A^2 = 9?

• 5

• 7

• 13

• 3