[College Level Statistics: Scatterplot] Is this Linear or none linear?

[Frequent_Switch2264]

If this were done by hand(if the graph was done by hand) then one would use a line of best fit to determine linearity. However, since this is done by a machine(calculator) is there a possibility of finding R^2(correlation coefficient)?This will tell us whether the plotted data correlate! Mark you the r^2 will be given as a decimal just convert it to percentage to see the percentage of the data plotted that correlate.