lass="p">(:)</span>
<span class="w">       </span><span class="n">x</span><span class="o">=</span><span class="p">[(</span><span class="kt">real</span><span class="p">(</span><span class="n">i</span><span class="p">),</span><span class="n">i</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span><span class="mi">30</span><span class="p">)]</span>
<span class="w">       </span><span class="n">y</span><span class="o">=</span><span class="mf">0.075</span><span class="o">*</span><span cl