The correlation between Cost and kda is 0.76. The more Cost, the more kda, and vice versa. But some values are higher than expected, some are lower. Efficiency is a difference between the value of kda depending on Cost (blue dots) with respect to the expected value (red line).
| Efficiency | |
|---|---|
| Boots Of Travel 2 | 0.8628 |
| Eye Of Skadi | 0.8190 |
| Bottle | 0.8027 |
| Butterfly | 0.7464 |
| Nullifier | 0.6131 |
| Kaya And Sange | 0.6080 |
| Swift Blink | 0.6059 |
| Disperser | 0.5804 |
| Boots Of Travel | 0.5776 |
| Yasha And Kaya | 0.5680 |
| Shiva'S Guard | 0.5098 |
| Revenant'S Brooch | 0.4930 |
| Linken'S Sphere | 0.4363 |
| Manta Style | 0.4263 |
| Power Treads | 0.4087 |
| Octarine Core | 0.3963 |
| Aghanim'S Shard | 0.3687 |
| Falcon Blade | 0.3551 |
| Daedalus | 0.3494 |
| Moon Shard | 0.3441 |
| Orb Of Corrosion | 0.3331 |
| Phylactery | 0.3188 |
| Soul Ring | 0.2798 |
| Satanic | 0.2663 |
| Phase Boots | 0.2344 |
| Wraith Band | 0.2330 |
| Holy Locket | 0.2326 |
| Harpoon | 0.2228 |
| Magic Wand | 0.2160 |
| Witch Blade | 0.2125 |
| Diffusal Blade | 0.1876 |
| Abyssal Blade | 0.1684 |
| Monkey King Bar | 0.1564 |
| Sange And Yasha | 0.1480 |
| Bracer | 0.1430 |
| Refresher Orb | 0.1397 |
| Assault Cuirass | 0.1261 |
| Scythe Of Vyse | 0.1212 |
| Skull Basher | 0.1032 |
| Null Talisman | 0.1030 |
| Bloodstone | 0.0892 |
| Veil Of Discord | 0.0883 |
| Desolator | 0.0737 |
| Hurricane Pike | 0.0660 |
| Pavise | 0.0587 |
| Overwhelming Blink | 0.0559 |
| Bloodthorn | 0.0498 |
| Heart Of Tarrasque | 0.0497 |
| Aghanim'S Scepter | 0.0418 |
| Mage Slayer | 0.0376 |
| Solar Crest | 0.0363 |
| Radiance | 0.0163 |
| Meteor Hammer | 0.0026 |
| Mjollnir | -0.0052 |
| Boots Of Bearing | -0.0286 |
| Vladmir'S Offering | -0.0399 |
| Arcane Blink | -0.0441 |
| Wind Waker | -0.0811 |
| Crystalys | -0.0958 |
| Gleipnir | -0.1032 |
| Blink Dagger | -0.1101 |
| Blade Mail | -0.1129 |
| Dragon Lance | -0.1135 |
| Pipe Of Insight | -0.1142 |
| Black King Bar | -0.1289 |
| Crimson Guard | -0.1321 |
| Aether Lens | -0.1463 |
| Lotus Orb | -0.1568 |
| Mask Of Madness | -0.1728 |
| Arcane Boots | -0.1771 |
| Spirit Vessel | -0.1834 |
| Eternal Shroud | -0.1850 |
| Aghanim'S Blessing | -0.2070 |
| Eul'S Scepter Of Divinity | -0.2089 |
| Echo Sabre | -0.2124 |
| Ethereal Blade | -0.2170 |
| Hand Of Midas | -0.2177 |
| Aeon Disk | -0.2185 |
| Tranquil Boots | -0.2269 |
| Heaven'S Halberd | -0.2392 |
| Rod Of Atos | -0.2452 |
| Force Staff | -0.2577 |
| Drum Of Endurance | -0.2644 |
| Glimmer Cape | -0.2752 |
| Orchid Malevolence | -0.2899 |
| Battle Fury | -0.3099 |
| Guardian Greaves | -0.3237 |
| Urn Of Shadows | -0.3261 |
| Vanguard | -0.3344 |
| Silver Edge | -0.3710 |
| Armlet Of Mordiggian | -0.4362 |
| Mekansm | -0.4628 |
| Medallion Of Courage | -0.4808 |
| Maelstrom | -0.5326 |
| Dagon | -0.6205 |
| Shadow Blade | -0.6785 |
| Helm Of The Dominator | -0.6938 |
| Helm Of The Overlord | -0.8424 |
| Dagon (2) | -0.8559 |
| Dagon (5) | -0.8680 |
| Dagon (3) | -1.0006 |
| Dagon (4) | -1.1346 |