The correlation between Assists and Kills is -0.69. The more Assists, the less Kills, and vice versa. But some values are higher than expected, some are lower. Efficiency is a difference between the value of Kills depending on Assists (blue dots) with respect to the expected value (red line).
Efficiency
Riki 3.7901
Zeus 3.3915
Spectre 3.2247
Spirit Breaker 3.1453
Void Spirit 3.0229
Ember Spirit 2.8175
Clinkz 2.8021
Tinker 2.7092
Necrophos 2.4310
Bloodseeker 2.2687
Ursa 2.2063
Storm Spirit 2.1390
Legion Commander 2.1375
Nyx Assassin 2.1185
Windranger 2.0957
Axe 2.0728
Arc Warden 1.9655
Weaver 1.8659
Queen of Pain 1.6222
Puck 1.5486
Undying 1.5485
Phantom Assassin 1.5448
Sniper 1.5308
Slark 1.4136
Outworld Destroyer 1.3866
Silencer 1.3671
Venomancer 1.1863
Viper 1.1448
Monkey King 1.1429
Ancient Apparition 1.0328
Skywrath Mage 1.0024
Chaos Knight 0.8426
Batrider 0.8401
Dawnbreaker 0.8235
Timbersaw 0.7504
Clockwerk 0.6967
Pudge 0.6400
Huskar 0.6269
Lich 0.6052
Techies 0.5769
Meepo 0.5653
Pangolier 0.5644
Dark Seer 0.5351
Razor 0.4945
Bounty Hunter 0.4107
Visage 0.4093
Drow Ranger 0.3973
Invoker 0.3957
Bristleback 0.3821
Templar Assassin 0.3229
Muerta 0.3186
Sand King 0.3152
Primal Beast 0.2982
Shadow Fiend 0.2690
Death Prophet 0.2628
Sven 0.2539
Gyrocopter 0.2468
Tusk 0.2436
Witch Doctor 0.2193
Disruptor 0.1593
Earthshaker 0.1102
Mirana 0.1032
Night Stalker 0.0953
Marci 0.0137
Phoenix -0.0134
Faceless Void -0.0255
Grimstroke -0.0947
Elder Titan -0.1109
Troll Warlord -0.1243
Kunkka -0.2276
Dark Willow -0.3225
Pugna -0.4228
Lifestealer -0.4230
Earth Spirit -0.4293
Oracle -0.4468
Juggernaut -0.4525
Wraith King -0.6553
Slardar -0.6657
Morphling -0.6941
Snapfire -0.7141
Brewmaster -0.7262
Rubick -0.7293
Magnus -0.7490
Hoodwink -0.7664
Phantom Lancer -0.7813
Mars -0.7842
Centaur Warrunner -0.8048
Jakiro -0.9905
Shadow Demon -0.9952
Medusa -1.0785
Abaddon -1.0955
Crystal Maiden -1.1065
Ogre Magi -1.1254
Underlord -1.1297
Alchemist -1.1739
Warlock -1.1797
Tiny -1.2019
Winter Wyvern -1.2031
Anti-Mage -1.2423
Tidehunter -1.2943
Treant Protector -1.3086
Leshrac -1.4550
Lycan -1.4872
Omniknight -1.5008
Lina -1.5494
Terrorblade -1.5576
Enchantress -1.5773
Vengeful Spirit -1.6910
Doom -1.7096
Beastmaster -1.7496
Luna -1.7679
Lion -1.9009
Nature's Prophet -2.1861
Shadow Shaman -2.1983
Dragon Knight -2.2707
Naga Siren -2.2887
Bane -2.2986
Keeper of the Light -2.6086
Broodmother -2.6390
Dazzle -2.7424
Io -2.8243
Enigma -2.9528
Lone Druid -3.4830
Chen -3.7359