A professor wants to research about correlation between their students' performance and time spent on watching web-series. The professor asked 7 students about how many hours per week they spent on watching web-series and their grades in the last test.

Following plot indicates the findings of this survey.

100 90 +..... .......... y = -3.7191x + 97.011 80 R2 = 0.9431 . . . . . ..... 70 ....4. . .LIFT 60 . . . ..+........ ............... % on test 50 40 30 20 10 0 0 2 4 6 8 10 12 14 Weekly hours spent on watching webseries