SOLUTION: 1. Find the inverse of the function y = 4x � 7. Is the inverse a function? [] means square root.. thanks for your help 2. Find the inverse of y= [x+9].Is the inverse

Question 180609: 1. Find the inverse of the function y = 4x � 7. Is the inverse a function?

[] means square root.. thanks for your help
2. Find the inverse of y= [x+9].Is the inverse a function?

Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
you find and inverse of a function by simple replacing all occurences of y with x and all occurence of x with y. A suggestion: use sqrt for square root instead of brackets...just a suggestion.
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y=4x-7 would become x=4y-7--->4y=x+7--->
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would become -->(squared both
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sides to eliminate radical)--->
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I graphed these so you could see what they look like graphed
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I got to thinking on the square root problem the range is limited by the square root. that is why on the graph you see only a 1/2 of a parabola. When we squared the radical to eliminate it we picked up extraneous roots which is why you see a full parabola on the graph of the inverse
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