Advanced Math practice question

Answer: 1

The x-intercepts are 4 and −2, and a parabola's vertex lies halfway between them: (4 + (−2))/2 = 1.

Common wrong answers

If you answered 2

2 is the sum of the intercepts (4 − 2), not their average.

If you answered -1

−1 has the wrong sign; (4 + (−2))/2 = 2/2 = 1.

If you answered -9

−9 is the y-coordinate of the vertex (g(1) = −3 × 3), not the x-coordinate.

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