Advanced Math practice question

Answer: 2

In vertex form, y = a(x − 3)² − 4. Substituting (1, 4) gives 4 = 4a − 4, so a = 2.

Common wrong answers

If you answered 1

1 uses 4 = 4a without the −4.

If you answered 8

8 is 4a.

If you answered -2

−2 has the sign wrong; the parabola opens upward.

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