Which equation represents a parabola?

A parabola has a squared term for one variable and a linear term for the other. In choice C, the equation has y² but only x to the first power: −3x + 4y² − 2y + 6 = 0, so it represents a parabola. Choices A and D have squared terms for both variables with the same sign, while B has squared terms with opposite signs.

AI-written and checked against the verified answer.