Wich one of these tables are linear and why? Please help

The system of equations graphed below has how many solutions?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

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%