he left by x and (x + 1) places</span></div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="comment"> </span></div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">now you do linear interpolation by drawing a line through these two points 2^x,</span></div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment">2^(x+1), then use f = m*x+b. the slope, m = rise over run</spa