Kiran collects data about the number of trees on school property and the average standardized test scores for those schools. Kiran says, "The scatter plot between the number of trees on a school property and student standardized tests scores shows a strong and positive correlation. An increase in the number of trees on school property causes the students to score better on standardized tests." What does it mean for the relationship between the variables when the correlation is strong in this situation? What does it mean for the relationship between the variables when the correlation is positive in this situation? What is wrong with the last sentence of Kiran's statement? Explain your reasoning.