Please help me answer this question (Look at the image)

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for

An average person in the united states throws away 4.5 × 10² g of trash per day. in 2013, there were about    3.2×1063.2×106 people in the u.s.