Given the function:
The given function is an exponential function
We will use the transformation to graph the following function:
As shown in the second function the variable (x) is replaced by (-x)
So, we can graph the second function by the reflection over the y-axis
The functions graph of the functions will be as shown in the following figure:
The given function is the blue color f(x) = 2e^x
And the second function is the red color f(x) = 2e^(-x)
The domain of the function is = ( -∞, ∞ )
And the range will be = ( 0, ∞ )
The function f(x) = 2e^(-x) will be a decreasing function
And has a horizontal asymptote the line y = 0