9
Answer: DSet 5: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 6x + 1, find x when f(x) = 61.
If f(x) = 6x + 1, find x when f(x) = 61.
A.
13
B.
11
C.
12
D.✓ Correct
10
Detailed Explanation
Choice D is the best answer. 6x + 1 = 61. 6x = 60. x = 10
Why others are wrong:
A: 13 is incorrect because it does not satisfy the equation.
B: 11 is incorrect because it does not satisfy the equation.
C: 12 is incorrect because it does not satisfy the equation.