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<p>points to estimate the derivative's value at those points or at intermediate points. This approach is particularly useful when dealing with data obtained from experiments, simulations, or situations where the function is defined only at specific intervals.</p>

<p><big>Finite differences</big></p>
<p>The simplest method is to use finite difference approximations.</p>

<p>A simple two-point estimation is to compute the slope of a nearby <a href="page.php?w=secant_line">secant line</a> through the points  and . Choosing a small number ,  represents a small</p><p>
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