Piano lessons cost $30 per lesson. Choose the graph that represents the total cost for x number of lessons. On a coordinate plane, the x-axis is labeled Lessons and the y-axis is labeled Total Cost (dollars). Points (1, 30), (2, 30), (3, 30), (4, 30), and (4, 30) are plotted. On a coordinate plane, the x-axis is labeled Lessons and the y-axis is labeled Total Cost (dollars). Points (0, 30), (1, 60), (2, 90), (3, 120), and (4, 150) are plotted. On a coordinate plane, the x-axis is labeled Lessons and the y-axis is labeled Total Cost (dollars). Points (1, 30), (2, 60), (3, 90), (4, 120), and (5, 150) are plotted.