The table represents a geometric sequence because the successive y-values have a common ratio of 0.6
A geometric sequence is a sequence of numbers, where the successive values after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio. In this case the common ratio is 0.6.
5 * 0.6 = 3
3 * 0.6 = 1.8
1.8 * 0.6 = 1.08