What is the value of c to the nearest degree

What is the common difference in the following arithmetic sequence 7,3,-1,-5

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

Which image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?