Elizabeth and daniel are starting competing coffee roasting businesses. they each first buy a large coffee roasting machine and then spend money to buy coffee beans as they need them. for daniel, these costs can be described by the equation y = 7x + 55 where y is total cost in thousands of dollars and x is the number of tons of coffee beans roasted. for elizabeth, these costs are given in the graph below. use the information (pictures) provided to determine who paid the least for their coffee roasting machine. explain how you determined this.