I keep asking for help, but so far no one has been able to help me. Please help; this assignment is due in only a couple of hours now and I can't figure this out.
Find f-1(x) (-1 is an inverse function). Sketch the graphs of y=f(x) and y=f-1(x) on the same coordinate axes. Answer for f(x)=2x+3 The answer I have is f-1(x)=x-3/2
y=2x+3
x=2y+3
x-3=2y
x/2-3/2=y
I have the answer above, but do not understand how to get the y=axes part of the graph. What part of it..
Basically, when i plug in y=2x+3, I get part of the graph, but not the other side and I do not want to get these wrong.

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2x+3 and (x-3)/2 I guess.

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