OLS回归房价与面积

def solve():
    import pandas as pd
    import numpy as np
    import matplotlib.pyplot as plt
    from sklearn.linear_model import LinearRegression
    url = '____'
    df = pd.read_csv(____)
    mod = LinearRegression().fit(____)
    print(____)
    print(____)
    plt.scatter(____)
    x_line = np.linspace(df['____'].min(), df['____'].max(), ____)
    plt.plot(x_line, mod.predict(x_line.reshape(____)), '____', lw=____, label='____')
    plt.xlabel(____); plt.ylabel(____); plt.title(____); plt.legend()
    plt.tight_layout(); plt.show()