<instructions>
<p>
Use the sliders to set the parameters of the quadratic <m>f(x)=ax^2+bx+c</m>.
Drag the point <m>A</m> on the graph and the point <m>P</m> to define a line.
Try to make the line tangent at the point at <m>A</m> and observe the resulting slope of the tangent line.
</p>
</instructions>
Use the sliders to set the parameters of the quadratic \(f(x)=ax^2+bx+c\text{.}\) Drag the point \(A\) on the graph and the point \(P\) to define a line. Try to make the line tangent at the point at \(A\) and observe the resulting slope of the tangent line.
