Solve the problem. Use what you learned from the model. Graph the functions y = 2x + 1 and y grid to determine whether they are linear or nonlinear. Describe the similarities and differences between the graphs, including their initial values and rates of change. Then graph the function y = 2x - 3 on the same grid. What are its similarities to the other two functions? Show your work. Use graphs, words, and numbers to 2x + 1 and y = 2x + 4 on the same explain your answer.