The school’s guidance department compares the grade-point averages and standardized state test scores for 10 students in each grade. The table below shows the correlation coefficient for each data set.Grade LevelCorrelation Coefficient9th grade0.310th grade–0.111th grade0.212th grade–0.8For which data set(s) is a linear regression model reasonable?
A
9th grade and 11th grade data setsC
10th grade and 12th grade data sets