Answer:
2
Step-by-step explanation:
I believe It is A. I think I am correct
9.2 (b) is the answer hope this helped!
The type of math is graphing and its super easy once u get it all you have to do is you have to get the top number (x) and the bottom number (y) and thats a coordinate pair so like the first one is 2,3 so just go right two and up three for secomd right 5 up 9 and so on
Answer:
Only the equation is a function
Step-by-step explanation:
we have
![f(x)=x^{2} +8](https://tex.z-dn.net/?f=f%28x%29%3Dx%5E%7B2%7D%20%2B8)
Find out the inverse of f(x)
Let
y=f(x)
![y=x^{2} +8](https://tex.z-dn.net/?f=y%3Dx%5E%7B2%7D%20%2B8)
Exchange the variables (x for y and y for x)
![x=y^{2} +8](https://tex.z-dn.net/?f=x%3Dy%5E%7B2%7D%20%2B8)
Isolate the variable y
![y^{2}=x-8](https://tex.z-dn.net/?f=y%5E%7B2%7D%3Dx-8)
square root both sides
![y=(+/-)\sqrt{x-8}](https://tex.z-dn.net/?f=y%3D%28%2B%2F-%29%5Csqrt%7Bx-8%7D)
Let
![f^{-1}(x)=y](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3Dy)
![f^{-1}(x)=(+/-)\sqrt{x-8}](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3D%28%2B%2F-%29%5Csqrt%7Bx-8%7D)
The inverse function is not a function (because for one input value the function has two different output values)
therefore
Only the equation is a function