How do you find a one to one inverse?

label Algebra
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I need to find the inverse of x^2-7,x is greater than or equal to 0. I also need to graph it.

May 11th, 2015

y =f(x)  = x^2-7

    x= f^-1(y)

      y+7 = x^2

x = (y+7)^1/2

      f^-1(y)  = (y+7)^1/2

        f^-1(x)   = (x+7)^1/2

           for    x> -7  or x =  -7

 the graph will be straight line having positive slope.

 regarding any doubt let me know  

              

May 11th, 2015

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