anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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nowhereman
  • nowhereman
Actually the graph of f:x↦y is already the graph of f^{-1}:y↦x too. But I guess they want you to mirror it at the line {(x,y) | x=y} so that the axis are being interchanged.
anonymous
  • anonymous
Do you know what equations I should be entering to get the right graphs, considering they are expecting the 2
nowhereman
  • nowhereman
2x+3 and (x-3)/2 I guess.

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dumbcow
  • dumbcow
what are you entering this in...graphing calculator? you could graph it by hand
anonymous
  • anonymous
I can use the graphing calculator; however I am using the Algebra Program called Bagatrix - College Algebra solved which is much easier
dumbcow
  • dumbcow
ok, well you have the correct equations
anonymous
  • anonymous
Let me try what you have and see
anonymous
  • anonymous
y=2x+3 does show up properly; however nothing else I plug in works. This was just a practice question; so I have the graph to go off of, but I can't get the other equation right for some reason
anonymous
  • anonymous
Because calculators are set up for y= type. But like the other guy said, you are working with simple graphs, just do it by hand.

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