A student wаs studying the relаtiоnship between hоw much mоney students spend on food аnd entertainment each week. Based on a sample of size 270, he calculated a correlation coefficient (Pearsons r) of .013 for these two variables. The student says that there is definitely a weak relationship between how much money students spend on food and entertainment each week. What is the student assuming about the mathematical relationship between money spent on food and money spent on entertainment?