This worksheet is a good way to drill proportional and linear relationships. The first 4 problems ask the student to determine if the relationship is proportional. The next 4 use the same exact tables and have the student determine if the relationship is proportional (this is a good place to point out that the relationships that were proportional can automatically be categorized as linear). The last 2 questions present the students with a proportional and non-proportional (but still linear) situation and have them complete a table, write an equation and graph the results. (Key is included and is in a copy and paste format from when I did this sheet in class with my own students. Some of the details were cut off during the paste, but the main answers were copied and pasted with no problem).