A general formula for a parabola is y squared is equal to 4 p x What is the value of p in the equation y squared is equal to negative 4 x ?

Compare the equation y² = −4x with the general form y² = 4px. The coefficient of x gives 4p = −4, so dividing both sides by 4 gives p = −1. Therefore, the correct choice is p is equal to negative 1.

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