Question

Find f(-1), f(0), f(3) for the following function.
f(x)=3x
f(-1)=Blank

Answer 1

If f(x) = 3x, this means that any number that replaces x in the parenthesis, would replace x in the right side too.

When x = -1:

f(-1) = 3(-1) = -3

When x = 0:

f(0) = 3(0) = 0

When x = 3:

f(3) = 3(3) = 9

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