Question

In which of the scenarios can you reverse the dependent and independent variables while keeping the interpretation of the slope meaningful? As the number of cigarettes smoked in a day increases, the risk for lung cancer increases. As the age of an infant increases, the height of the infant increases. As the number of vehicles in a city increases, the amount of pollution in the city increases. As the concentration of salt in water increases, the density of water increases. As the number of calls made by a cell phone increases, the cell phone bill amount increases.

Answer 1

Answer- the scenario depicting cars in a city and its pollution, my reasoning is that this scenario presents the only possibility for one end of the slope to fully nullify itself through use or discontinuation of use. The others have a lower limit similar to a price ceiling except for a minimum amount.