title: Position of Cells where the mid point of graph lies
body: <p>I have the following data.</p>
  
  <pre><code>x       y
  0.00    0.00
  0.03    1.74
  0.05    2.60
  0.08    3.04
  0.11    3.47
  0.13    3.90
  0.16    4.33
  0.19    4.59
  0.21    4.76
  0.20    3.90
  0.18    3.12
  0.18    2.60
  0.16    2.17
  0.15    1.73
  0.13    1.47
  0.12    1.21
  0.14    2.60
  0.17    3.47
  0.21    3.90
  0.23    4.33
  0.26    4.76
  0.28    5.19
  0.31    5.45
  0.33    5.62
  0.37    5.79
  0.38    5.97
  0.42    6.14
  0.44    6.22
  0.47    6.31
  0.49    6.39
  0.51    6.48
  </code></pre>
  
  <p>I used <code>=max()/2</code> to obtain the 50%th percentile, which in this case is <code>3.24</code>.</p>
  
  <p>The point <code>3.24</code> does not exist for the <code>y</code> values but it falls in between the <code>3.04</code> and <code>3.47</code>. </p>
  
  <p>How can I find the address of these 2 cells?</p>
  
  <p>Note: The 50th percentile also hits on the other part of the graph, but I only require the first instance.</p>
  
  <p><img src="https://i.stack.imgur.com/CQYM8.jpg" alt="Graph"></p>