# 1) Write an equation that expresses the fact that a function f is continuous at the number 4. # 2) If f is continuous on (-co, oc), what can you say about its graph? # 3) (a) From the graph of f, state the numbers at which / is discontinuous and explian why. (b) For cach of the numbers stated in part (a) determine whether / is continuous from the right, or from he left, or neither. -4 - 2 2