Questions 1 - 7 should be answered based on the information provided below: Do heavier cars use more gasoline? To answer this question, a researcher randomly selected 15 cars. He collected their weight {in hundreds of pounds) and the mileage {MPG} for each car. From a scatterplot made with the data. a linear model seemed appropriate. The following output was obtained from SAS: war-m Standard [Value 2; 2- III En'or mm mum