Lina and Jeffrey are packing bananas for shipping. They each need to pack 60 boxes. The number of boxes Lina has left to pack is given by the function b= -5t + 60,
where b is the number of boxes and t is the time in minutes. The table shows the
number of boxes Jeffrey has left to pack after each minute. Assuming Jeffrey
continues to pack at the same rate and he and Lina start at the same time, who
finishes packing first? Explain.