What is the common difference between successive terms in the sequence? 9, 2.5, –4, –10.5, –17, ...

1. –11.5
2. –6.5
3. 6.5
4. 11.5

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

Which strategy is used by public health to reduce the incidence of food poisoning?