Graphical Reasoning A line with slope m passes through the point (0, 4) and has the equation .
(a) Write the distance d between the line and the point (3, 1) as a function of m.
(b) Use a graphing utility to graph the function d in part (a).Based on the graph, is the function differentiable at every value of m? If not. where is it not differentiable?
