How do you evaluate a function #f(x)=x+7# for a specific value, f(-1)?

Answer 1

y=6

When evaluating functions using function notation the number in place of the "x" in "f(x)" is the number that you plug into the x of your function.

So, if #f(x)=x+7# then #f(-1)=(-1)+7#

Therefore, #f(-1)=6#.

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Answer 2

Eli Assouline

To evaluate the function f(x) = x + 7 for the specific value f(-1), substitute -1 for x in the function. So, f(-1) = (-1) + 7 = 6.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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