Maths-
SAT
Easy
Question
The linear function f is defined by f(x) =cx+ d, where c and d are constants. If f (50) = 27,000 and f(100) = 38,000, what is the value of c?
The correct answer is: 220
f(x) = cx + d
f(50) = 50c + d = 27,000
f(100) = 100c + d = 38,000
f(100) – f(50) = 50c = 11,000
c = 220.
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