Please help me ! Use 1st and 2nd differences to determine if the following table is linear, quadratic or neither

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%

Ineed me i stuck and i don’t want to get it wrong

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.