Since Spring started, Kareem has been surveying the growth of leaves on his neighborhood trees. He goes out every day and computes the average number of leaves on a sample of trees. He created a scatter plot where the y-axis represents the average number of leaves on the trees, and the x-axis represents the number of weeks since Spring started. Write a linear equation in slope-intercept form that can be used to approximate the data distribution using the two data points labeled on the best fit line.