Question 6 (1 point) Graphically, the instantaneous rate of change of a function at a specific x-value can be estimated by: (a) Determining the slope of a single secant line on the left side of the x-value b) Determining the slope of a single secant line on the right side of the x-value O c) Determining the slope of a tangent line drawn at the x-value Od) It is not possible to determine the instantaneous rate of change graphically