Question 25
Graphs of FunctionsA cubic function f(x) is specified by the graph shown above. The values of the independent variable for which the function vanishes are
- A.−1, 0, 1
- B.−1 ≤ x ≤ 1
- C.x, −1
- D.x > 1
Show the answer and explanation
Answer: A (−1, 0, 1)
Explanation
"Vanishes" means f(x) = 0. The graph crosses the x-axis at x = −1, x = 0 and x = 1.