Kenneth S. answered 02/04/18
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
Function j is a linear function. its y-intercept is -1 and its x-intercept is 1/3 so you may graph it on that basis.
Both the domain and range of each of j and j-1 are all Reals.
The inverse is the reflection of j over the line y=x.