The domain of a function is all the values of x that is satisfied by the function.
• The domain of the function is, x
The range of a function is the set of all values of y that satisfies the function.
• The range of the function is , y is greater than zero
• The graph is ,increasing, over the interval (0, ∞)
,
• The graph is ,decreasing, over the interval (-∞, 0)