A teacher gathered data about the number of hours her students spent studying for a test and their resulting test grades. She found that on average, for every 30 minutes studied, the grade increased by 8 points. Which statements about this relationship are true? Check all that apply. The data set would have a linear association. The data set would have a nonlinear association. The data set would have a positive correlation. The data set would have a negative correlation. Every student earns 16 more points for each additional hour they study. Students that study more tend to earn better grades on the test.