Algebra

posted 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...

  1. 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 ....

  2. 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.

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