It is not specified how the data is presented (e.g. in a table, graph, etc.) so it is not possible to determine the characteristics of the graph. In general, the relationship between studied and test grades is expected to be positive, meaning that as the amount of time spent studying increases, the test grade is also expected to increase. However, other factors such as the difficulty of the material, comprehension of the material, and individual learning styles may also impact the relationship between studying and test grades.
