title: How to plot a nonlinear equation in matlab
body: <p>I need to plot this equation : <code>(y)/[(4*3.14*10^-7)*(1+(4200/(1+0.03(y^8.2))^0.5))]</code>
  on the interval <code>y=0</code> to <code>y=3</code></p>
  
  <p>I tried this</p>
  
  <pre><code>y=0:0.5:1:1.5:2:2.5:3;
  x=(y)./((4*3.14*10.^-7)*(1+(4200./(1+0.03*y.^8.2).^0.5)));
  plot(x,y)
  </code></pre>