1, 4, 9, 16, …

85, 81, 77, 73, …

 $\frac{1}{2},\frac{1}{4},\frac{1}{8},\frac{1}{16},\ ...$  

-12, -18, -24, -30, …

4, 16, 36, 64, …

0.1, 0.3, 0.5, 0.7, …

1.7, 3.4, 6.8, …

50, 25, 12.5, 6.25, …

11, 20, 29, 38, …

1, 2, 1, 2, ...

5, -10, 20, -40,...

Identify the common difference of the sequence below:

-2.3, -1.1, 0.1, 1.3,...

Identify the next three terms of the sequence below:

-6, -10, -14,...