After declining between 1940 and 1980 the number of multigenerational households has been increasing since 1980 The function h x 0 012x 0 573x 35 726 can b used to estimate the number of multigenerational households in country A in millions x years after 1940 In what year were there 40 million multigenerational households There were 40 million multigenerational households in Round down to the nearest whole number