The area, a, of an ellipse can be determined using the formula a = πxy, where x and y are half the lengths of the largest and smallest diameters of the ellipse.
Answer
A
y = a · πx
B
y = a + (πx)
C
y = a – πx
D
y = a ÷ (πx)
Explanation
Start with the formula a = πxy. To isolate y, divide both sides by πx, giving y = a ÷ (πx). Therefore, the correct choice is D, “y = a ÷ (πx).”
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