Question 939246
<pre>
All functions of the form y = k*a<sup>x</sup>
have a horizontal asymptote which is the x-axis 
ans which has equation y=0.

That's because when 0.6 is a positive number 
less than 1 and when you raise a positive number 
less than 1 to larger and larger powers, the
result gets smaller and smaller and gets closer
and closer to nothing at all, namely 0. 

{{{graph(400,400,-3,10,-3,10,4(0.6)^x)}}}


Edwin</pre>