From 904d1d685c9669b97d72804775b924d8250a8843 Mon Sep 17 00:00:00 2001
From: Joel Burget <joelburget@gmail.com>
Date: Fri, 31 Aug 2012 16:16:56 -0700
Subject: [PATCH] Get derivative graph working with timeline

---
 utils/derivative-intuition.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/derivative-intuition.js b/utils/derivative-intuition.js
index 0af13d9e6..db97d2fba 100644
--- a/utils/derivative-intuition.js
+++ b/utils/derivative-intuition.js
@@ -274,7 +274,7 @@ $.extend(KhanUtil, {
             graph.style({
                 stroke: KhanUtil.DDX_COLOR,
                 strokeWidth: 1,
-                opacity: 0
+                opacity: duration === 0 ? 1 : 0
             }, function() {
                 ddxplot = graph.plot(function(x) {
                     return KhanUtil.ddx(x);