 href="../../3-Linear-Methods-for-Regression/ex3-18/" class="md-nav__link">
        Ex. 3.18
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../3-Linear-Methods-for-Regression/ex3-19/" class="md-nav__link">
        Ex. 3.19
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../3-Linear-Methods-for-Regression/ex3-20/" class="md-nav__link">
  