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Which function has the values f(2)=4 and f(-1)=-5?

a. f(x)=3x-11
b. f(x)=(1/3)x-2
c. f(x)=3x-10
d. f(x)=3x-2
e. f(x)=-3x-2

User Lester S
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1 Answer

5 votes

Final answer:

The correct function that matches the given values f(2)=4 and f(-1)=-5 is option d, which is f(x) = 3x - 2.

Step-by-step explanation:

The student is looking for a function f(x) that satisfies the conditions f(2)=4 and f(-1)=-5. To solve this, substitute the given x-values into each function option and check if the resulting y-values match the conditions given.

  • Option a: f(x) = 3x - 11
  • Option b: f(x) = (1/3)x - 2
  • Option c: f(x) = 3x - 10
  • Option d: f(x) = 3x - 2
  • Option e: f(x) = -3x - 2

By substituting x = 2 and x = -1 into each option,

  • For option a: f(2) = 3(2) - 11 = -5 (Does not match)
  • For option b: f(2) = (1/3)(2) - 2 = -4/3 (Does not match)
  • For option c: f(2) = 3(2) - 10 = -4 (Does not match)
  • For option d: f(2) = 3(2) - 2 = 4 and f(-1) = 3(-1) - 2 = -5 (Matches both conditions)
  • For option e: f(2) = -3(2) - 2 = -8 (Does not match)

Therefore, the correct answer is option d: f(x) = 3x - 2.

User Charita
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