series,x,y Old task A,0,2 Old task A,0.25,1.2800000000000002 Old task A,1,0.5 Old task A,4,0.08000000000000002 Old task A,16,0.006920415224913498 New task B,0,0 New task B,0.25,0.08000000000000002 New task B,1,0.5 New task B,4,1.2800000000000002 New task B,16,1.7716262975778547