Question 569104
Could someone please help me write an equation to describe the exponential function as y=ab^x

The base is 5.  The graph passes through the point(1,2)
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{{{y = a*5^x}}}
{{{2 = a*5^1 = 5a}}}
a = 0.4
--> {{{y = 0.4*5^x}}}