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What is the reflection of f(x)=-x+1 about the x-axis?

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What is the reflection of f(x)=-x+1 about the x-axis?

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  1. -(-x+1)

    works on my graphing calculator!!!!!!


  2. That's about the circumference of the drum in my washing machine.

    Chuckle... :-)

  3. ANSWER: y=x-1

    REASON:

    a reflection about the x axis is a change of sign in y.

    so if you let y=f(x),

    then the reflection is -y=-f(x)

    so the equation of the reflected line (lets call the function g) is:

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

    or y=x-1
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