Derivative:The derivative measures how much a function changes as its input changes. It represents the instantaneous rate of change or slope at any given point on the graph.
Tangent Line:A line that touches and "hugs" the curve of a differentiable function at only one point, representing the instantaneous rate of change (slope) at that specific point.
Critical Point:A critical point occurs when either the derivative is zero or undefined. These points are important for determining maximums, minimums, and inflection points on graphs.