c# equation is drawing a hole in the graph
<pre><code>        for (double x=0;x&lt;=7D;x+=.01D)
        {
            b = 1.771289; c = 2.335719; d = 0.5855771; g = 4.4990302; h = 4.3369349; k = 0.67356705;
            y = b * Math.Exp(-(0.5 * (Math.Pow(((x - c) / d), 2)))) +
                g * Math.Exp(-(0.5 * (Math.Pow(((x - h) / k), 2))));
            qResults.Rows.Add(x, y);
        }
</code></pre>

<p>the graph is good but it draws a hole in the peek.i am using mschart:</p>

<p><a href="http://imageshack.us/photo/my-images/824/graph1v.png/" rel="nofollow">http://imageshack.us/photo/my-images/824/graph1v.png/</a></p>

<p>i would like to know whether the hole is a problem with my syntax?</p>
