Advanced Math practice question

Answer: A. y = 5 − x²

A parabola opens downward when the coefficient of x² is negative. y = 5 − x² is y = −x² + 5.

Why the other answers are wrong

B. y = x² − 5

x² − 5 has a positive x² coefficient, so it opens upward.

C. y = 5x

5x is a straight line.

D. y = 5ˣ

5ˣ is an exponential curve, not a parabola.

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