PSAT Math Grid-Ins Question 94: Answer and Explanation
Question: 94
The function f(x) is graphed in the xy-plane above. If the maximum value of f(x) = z, what is the value of -f (z)?
Correct Answer: 2
Explanation:
2
Difficulty: Hard
Getting to the Answer: First, find the maximum value, which means the highest y-value. The maximum value occurs at the point (0, 3) so 3 is the maximum value. Find f (3) by locating the y-value when x = 3. The point (3, -2) means that f(3) = -2. Remember that the question asks for the value of -f (z) = -f (3) = -(-2) = 2. Grid in 2.
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