Choose the correct expression for \(f(x)\) given in the graph.
2016

Choose the correct expression for \(f(x)\)Β given in the graph.
- A.
\(π(π₯) = 1 β |π₯ β 1|\) - B.
\(π(π₯) = 1 + |π₯ β 1| \) - C.
\(π(π₯) = 2 β |π₯ β 1| \) - D.
\(π(π₯) = 2 + |π₯ β 1| \)
Attempted by 31 students.
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Correct answer: C
Key features: the graph is a V-shaped (absolute value) curve with a peak at (1, 2) and straight lines of slope Β±1 on either side.
Vertex (peak) at x = 1 with value 2, so the formula should use |x β 1| and be centered at 1 with a constant term 2.
The graph is upside down (a maximum at the vertex), so the absolute value is subtracted from 2 rather than added.
Slopes on the sides are Β±1, so the coefficient in front of |x β 1| is 1.
Putting these together gives: f(x) = 2 β |x β 1|
Quick checks:
At x = 1: f(1) = 2 β |1 β 1| = 2, matching the peak.
At x = 3: f(3) = 2 β |3 β 1| = 0, matching the plotted point near (3, 0).
At x = β3: f(β3) = 2 β |β3 β 1| = β2, consistent with the left-side value shown.
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