Advanced Math practice question

Answer: 7

By symmetry about x = 4, the intercept at x = 1 (three left of the axis) pairs with one three to the right: x = 7.

Common wrong answers

If you answered 8

The known intercept is 3 units from the axis, so the other is at 4 + 3 = 7.

If you answered 9

9 is the vertex's depth |−9|, not an intercept.

If you answered -1

Reflect across the axis x = 4, not across the y-axis.

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