What is the shape of the graph of the function? g(t)=\dfrac{4}{9}\cdot \left(\dfrac{2}{5}\right)^tg(t)= 9 4 ⋅( 5 2 ) t

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.