1+1+1+1=4
2+2+2+2=16
3+3+3+3=?

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%

The anwser cause i do not understand just plez

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25