Based on the options provided, the best choice for describing a strength of showing the regression line on the graph would be:
This clearly shows a strong positive relationship.
This option indicates that there is a clear visualization of how SUV age affects price, assuming the graph indicates that as the age increases, the price decreases (which would actually suggest a negative relationship). If the regression line slopes downwards, then the correct interpretation would rather point to a negative relationship.
Be sure to choose the answer based on the actual visual representation of the regression line on your graph.