9x² + 4y² = 36 is a/an _____?
- Circle
- Vertical ellipse
- Horizontal ellipse
- None of these
Explanation
To determine the type of conic section, rewrite the equation in standard form:
9x² + 4y² = 36
Divide by 36:
x²/4 + y²/9 = 1
Since 9 > 4, the major axis is vertical.
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