Graphically, the instantaneous rate of change of a function at a specific x-value can be estimated by: O a) It is not possible to determine the instantaneous rate of change graphically O b) Determining the slope of a single secant line on the left side of the xvalue O c) Determining the slope of a tangent line drawn at the x-value Q d) Determining the slope of a single secant line on the right side of the xvalue Estimate the instantaneous rate of change off (ac ) = 2x4 - 3x - 1 at x=-1. Oa) Af C Ax Ob) Af Ax =-11 O c) Af = 4 Ax O d) Af = 11 AxEstimate the instantaneous rate of change of f (ac ) = cos (ac + it) - 3 at x= -1. O a) Af Ax = 1 Ob) Af = 4 O c) Af Ax = 0 O d) Af = -1