Update homework 02

.vscode/settings.json

+{
+    "python.pythonPath": "d:\\Python\\tensorflow-homework\\venv\\Scripts\\python.exe"
+}
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02. linear-regression-with-one-variable/docs/README.md

+# 单变量线性回归
+
+## 散点图和目标模型
+
+![图 1](img/1.png)
+
+> 图 1 为随机生成数据的散点图
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02. linear-regression-with-one-variable/main.py

+# -*- coding: utf-8 -*-
+
+import tensorflow as tf
+import numpy
+import matplotlib.pyplot as pyplot
+
+numpy.random.seed()
+
+# 生成 x_data
+x_data = numpy.linspace(0, 100, 500)
+# 生成 y_data
+y_data = 3.1234 * x_data + 2.98 + numpy.random.randn(*x_data.shape) * 0.9
+# 画出散点图
+pyplot.scatter(x_data, y_data)
+# 画出想要学习的目标函数
+pyplot.plot(x_data, 3.1234 * x_data + 2.98, color = "red", linewidth = 1)
+# pyplot.show()
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