Problems 3. Here are some functions with two-piece definitions. Graph each function. Part a is already done as an example. Work with your group on the others. Slope = rise run -2x+6 if x51 x+1 if x>1 m = -2 -2 a. A(x) = Note the use of open and closed circles to show that the point (1, 4) is part of the graph, but (1, 2) is not. That's because x = 1 is covered by the first part of the rule. As soon as x is greater than 1, the second rule applies. 2 x if x20 b. R( x ) = x - 4 if x2