diff --git a/2-9.py b/2-9.py
index e3c5a88..298af4b 100644
--- a/2-9.py
+++ b/2-9.py
@@ -60,9 +60,9 @@ if __name__ == "__main__":
     hours = [hour for hour, count in hourly_404_counts_list]
     counts = [count for hour, count in hourly_404_counts_list]
 
-    # 使用 matplotlib 绘制条形图
+    # 使用 matplotlib 绘制折线图
     plt.figure(figsize=(10, 6))
-    plt.bar(hours, counts, color='blue')
+    plt.plot(hours, counts, marker='o', color='b', linestyle='-', linewidth=2, markersize=6)
     plt.title('每小时404响应代码数量')
     plt.xlabel('小时')
     plt.ylabel('404响应次数')