A photographer increases the price he charges to print photographs He wants to know if this affects his sales.
Last week, before the price increase, the average number of photos ordered was 12.
This week customers ordered:

Photos customers
ordered
1-10. 26
11-20. 14
21-30. 6
31-40. 4
41-50. 0
51-60. 0

Does the price increase seem to have had an effect on the number of prints ordered per customer?
Explain your answer. Include calculations to support your decision.