Which of the following is a reflection of f(X)= -X+1 about the x-axis?

Question

r(x) = x +1

r(x)= x-1 I believe it's this one?

r(x)= -(x-1)

none of the above

Answer 1

f(x) = -x + 1

To reflect into the x axis substitute -x into f(x):

r(x) = f(-x) = -(-x) + 1 = x + 1

Therefore, your answer is the first one.

If you were being asked to reflect in the y axis then you would have multiplied f(x) by -1:

r(x) = -f(x) = -(-x + 1) = x - 1

Hope this helps!

Answer 2

Yep. x-1