1. A train has 20 carriages, and each carriage seats 8. When the train is full, it holds z people. 2. A room is x metres long and y metres wide. If the length were halved, the perimeter of the floor of the room would be p metres.
3. p new pench + s pounds = x pounds

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