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Functions

If ƒ(x) = 2x + cx and c = 15, what is ƒ(-2)
Answer
With problems like these, we always need to simplify the function by incorporating the c value

Apply the (c) value of 15 and group x constants into one term

ƒ(x) = 2x + 15x
ƒ(x) = (2 + 15)x
ƒ(x) = 17x

Now evaluate ƒ(-2)

ƒ(-2) = 17(-2)
ƒ(-2) = -34





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