Scatter, by group with best fit line

Size: 150 × 150 | 300 × 270 | 750 × 676 | 750 × 676 | 979 × 882 | 979 × 882 | 979 × 882 | 900 × 882 | 979 × 882 | 800 × 600 | 600 × 800 | 800 × 800 | 600 × 450 | 450 × 600 | 600 × 600 | 400 × 300 | 300 × 400 | 400 × 400 | 200 × 150 | 150 × 200 | 200 × 200 | 979 × 882 | 360 × 240 | 360 × 300 | 50 × 50 | 272 × 182 | 979 × 882