The minimum of a parabola is located at negative 1 comma negative 3 The point 0 comma 1 is also on the graph. Which equation can be solved to determine the a value in the function representing the parabola?

A parabola with vertex (−1, −3) can be written in vertex form as y = a(x + 1)² − 3. Substitute the point (0, 1): set x = 0 and y = 1, giving 1 = a(0 + 1)² − 3. This is choice A.

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