Question

a to the power zero is equal to 1 when

Answer 1

a to the power 0 is always 1. This is a law of exponent.

Answer 2

this is applicable to all real values of a except 0
${1}^{0} \\ {2}^{0} \\ { 3}^{0}$
etc will have different graphs but all will intersect at point (0,1)