Remove wrong addition of padding

src/scales/scale.linear.js

@@ -173,7 +173,6 @@
 				// Bottom - top since pixels increase downard on a screen
 				var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
 				pixel = (this.bottom - this.paddingBottom) - (innerHeight / range * (value - this.start));
-				pixel += this.paddingTop;
 			}
 
 			return pixel;