Simplify 18.please help

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%

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

What is the value of f(x) = 2.2 for f(-2)?