## Algebra 2 (1st Edition)

Here, we have $\dfrac{-5}{2}-(-1) =-1.5$ $-1-\dfrac{1}{2} =-1.5$ $\dfrac{1}{2}-2 =-1.5$ $2-\dfrac{7}{2} =-1.5$ It can be seen that there is a constant difference of $-1.5$ between successive terms. So, this shows an arithmetic sequence.