Let g(x) be the reflection of f(x) = x squared+ 3 in the x-axis. What is a function rule for g(x)?
g(x) is the reflection of `f(x)=x^2+3` in the x-axis.
To reflect over the x-axis we change all y values to -y; alternatively if `y=af(x-h)+k` , then the reflection is achieved by multiplying y by (-1).
The graph of f(x) in red, g(x) in green: