The graph of both functions is attached
The graphs are reflections of each other across the line y = x
How to find the inverse function
The given function f(x) = 2x - 1
let y = 2x - 1
make x the subject of formula
y + 1 = 2x
x = (y + 1) / 2
interchanging the variables
y = (x + 1)/2