<instructions xmlns:pi="http://pretextbook.org/2020/pretext/internal">
<p>
Drag the point <m>B</m> to move the point on the graph and change the secant line. Notice that there is no well-defined limiting tangent line as <m>x \to 0</m>.
</p>
</instructions>
Drag the point \(B\) to move the point on the graph and change the secant line. Notice that there is no well-defined limiting tangent line as \(x \to 0\text{.}\)
