Added matplotlib inline

Mission529Solutions.ipynb

@@ -850,6 +850,8 @@
    ],
    "source": [
     "import matplotlib.pyplot as plt\n",
+    "%matplotlib inline\n",
+    "\n",
     "plt.plot(euro_to_dollar['Time'], euro_to_dollar['US_dollar'])\n",
     "plt.show()"
    ]