A linear function f satisfies f(0) = 5 and f(2) = 11. What is f(5)?
A13
B17
C20
D23
Answer & Solution
Correct answer: C. 20
From f(0) = 5 and f(2) = 11: slope = (11 − 5)/(2 − 0) = 3. So f(x) = 3x + 5 (using y-intercept 5). Therefore f(5) = 3(5) + 5 = 20.
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