Table 2: 32 - 160 96 - 480 (3•32=96 so 3•160=480) 4 - 20 (32/8=4 so 160/8=20) 100 - 500 (96+4=100 so 480+20=500)
Explanation: In my opinion, Table A is better because it finds the unit rate immediately. It also takes less steps and makes it easier to find out it'll take 500 minutes for 100 miles.