The given function is
[tex]y=-9(9)^x[/tex]The domain the values of x which make the function defined
The range is y that is the corresponding values of y to the given x
All values of the set of real numbers can be the value of x
No value of x can make the function undefined, then
The domain is all real numbers
Since the initial value of the function (value of y at x = 0) i
