Please help! I have been stuck on this one

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%

Explain how you can use the associative property to evaluate (7x50)x4.

What is the distance between the points (2, 5) and (5,9)?