Question

Janet said that the common difference in the sequence below is -2. Is she correct? Justify your answer using complete sentences and proper grammar.
1, -2, 4, -8....

Answer 1

Yes Janet is correct since 1*-2=-2, -2*-2=4, and 4*-2=-8. The sequence just keeps going.

Answer 2

She is incorrect since -1 - - 2 is 3<span />