title: Sage plot slope field and differential equation
body: <p>I am attempting to plot the slope field, and several unique solutions in sage notebook, but my slope field does not match the solutions.</p>
  
  <pre><code>c = var('c')
  y = (ln(x)+c)/x
  show(y)
  p1 = plot_slope_field( y, (x,0,5), (c,-5,5))
  
  for i in range(-5,5):
      p1 = p1 + plot(y(c=i),x,0,5, ymin=-5, ymax=5)
  p1
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/ESiAU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ESiAU.png" alt="plot"></a>p1</p>
  
  <p>I would expect the slope field to approximate the slope of the near-by functions, but they don't appear to match at all.</p>