At the school fair, students used a scatter plot to compare the number of T-shirts sold with the number of jars of jam sold. What can you conclude about the relationship between the sales of the T-shirts and the jars of jam? Math item stem image. There is no correlation between the sales of T-shirts and the sales of jars of jam. The more jars of jam sold, the more T-shirts sold. The more T-shirts sold, the more jars of jam sold. The jars of jam sales and the T-shirt sales have a positive correlation, but neither may cause the other.