The scatterplot shows the relationship between the age of a car, , and its resale value, . Which of the following graphs shows the most appropriate model for the data? (Assume the scatterplot  now displays points that generally decrease linearly from left to right, with a negative slope.)
A graph showing a straight line with a positive slope. 
A graph showing a straight line with a negative slope that passes through the middle of the linearly decreasing data points. 
A graph showing a curved line. 
A graph showing a horizontal line. 