Answer:
A
Explanation:
f( x) = a*b ^x
if we have the point (0,a) we have (x=0, y=a)
f(x) = y
y= a*b^x, substitute x=0 and y=a
a=a*b^0, anything to the power of 0 is equal to 1
a= a*1
a=a true
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