which of following best represents the instantaneous rate of change at the vertex of an upright parabola? a. -1 b. 0 c. 1 d. ∞
The slope at the vertex of the parabola (which is what you are seeking) = 0
Slope will be the derivative of the parabola at any given point....or the slope of the tangent line at that point....= 0 for this parabloa.