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Introduction to derivatives
Discover what magic we can derive when we take a derivative, which is the slope of the tangent line at any point on a curve.
Understanding that the derivative is just the slope of a curve at a point (or the slope of the tangent line)
Calculus-Derivative: Finding the slope (or derivative) of a curve at a particular point.
Calculus-Derivative: Finding the derivative of y=x^2
How tangent lines are a limit of secant lines, and where the derivative fits into all this.
Finding the slope of a tangent line to a curve (the derivative). Introduction to Calculus.
More intuition of what a derivative is. Using the derivative to find the slope at any point along f(x)=x^2