Consider the following three data sets, in which the variables of interest are x = commuting distance and y = commuting time. Based on a scatter-plot and the values of s and r2, in which situation would simple linear regression be most (least) effective, and why?

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Data Set 2 3 15 42 16 35 17 45 18 42 19 20 46 50 115 50 60 16 32 10 16 44 15 22 45 63 25 31 10 20 25 20 23 49 17.50 29.50 1270.8333 2722.5 1270.8333 1431.6667 1.685714 13.666672 2.142295 7.868852 1.126557 3.196729 βο SST SSE 114.83 5897.5 1627.33 65.10 65.10