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Linear Functions

SAT Math· difficulty 3/5

The function f(x)=2x+1f(x) = 2x + 1 is defined on the domain −3≤x≤4-3 \leq x \leq 4. What is the range of ff?

  • A

    −3≤f(x)≤4-3 \leq f(x) \leq 4

  • B

    −7≤f(x)≤9-7 \leq f(x) \leq 9

  • C

    −5≤f(x)≤7-5 \leq f(x) \leq 7

  • D

    −5≤f(x)≤9-5 \leq f(x) \leq 9

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Explanation

f(−3)=−5f(-3) = -5, f(4)=9f(4) = 9. Range: −5≤f(x)≤9-5 \leq f(x) \leq 9.

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