Asked by Chloe
                Describe when the graph of f(x) = ab^x is a horizontal line.?
I thought it was when a=0, but its not...
            
        I thought it was when a=0, but its not...
Answers
                    Answered by
            bobpursley
            
    take a look at this, letting a=5, b=3 http://www.wolframalpha.com/input/?i=y+%3D+3*5%5Ex
so when x= large negative number, then slope goes to ....
                    Answered by
            Steve
            
    technically, the graph is never a straight line unless
a=0 or
b=1
But it will approach a horizontal asymptote otherwise, as Reiny suggests.
    
a=0 or
b=1
But it will approach a horizontal asymptote otherwise, as Reiny suggests.
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