SOLUTION: 2. Find the inverse of y=[x+9]. Is the inverse a function? [] means that its square root..thanks for helping..

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Question 181286: 2. Find the inverse of y=[x+9]. Is the inverse a function?

[] means that its square root..thanks for helping..
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
to find the inverse of a function y is substituted for x and x is substituted for y
:
x=sqrt%28y%2B9%29
:
x%5E2=y%2B9 after squaring both sides
:
y=x%5E2-9
:
which is a parabola and a function
:
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2Cx%5E2-9%29