Advanced MathEasyMatching a function to a table
Advanced Math practice question
The table shows three values of a function f. x | f(x) 1 | 1 2 | 4 3 | 9 Which of the following could define f?
- A. f(x) = x²Correct
- B. f(x) = 2x
- C. f(x) = 3x − 2
- D. f(x) = x + 1
Answer: A. f(x) = x²
1² = 1, 2² = 4, 3² = 9.
Why the other answers are wrong
- B. f(x) = 2x
- 2x gives 2, 4, 6.
- C. f(x) = 3x − 2
- 3x − 2 gives 1, 4, 7; the last row fails.
- D. f(x) = x + 1
- x + 1 gives 2, 3, 4.
More Advanced Math questions
- Easy
If f(x) = 3x − 7, what is the value of f(5)? - Easy
What are the solutions to x² − 9 = 0? - Easy
Which of the following expressions is equivalent to x² + 7x + 12 ? - Easy
The function g is defined by g(x) = x³ + 2x. What is the value of g(−2) ? - Easy
For x > 0, which of the following is equivalent to ∛(x⁵) ? - Easy
The function h is defined by h(x) = (x − 6)(x + 2). What is one value of x for which h(x) = 0 ?
Not affiliated with the College Board. SAT is a trademark of the College Board.