Derivative: The derivative of a function represents its rate of change at any given point. It measures how the output values change with respect to the input values.
Slope: The slope of a line represents its steepness or incline. For a constant function, the slope is always zero because there is no change in the output values.
Tangent Line: A tangent line touches a curve at only one point and has the same slope as that point on the curve. For a constant function, the tangent line is horizontal since the slope is zero everywhere.