A company wants to know if the amount it spends on advertising affects the number of toys it sells. The company plans to collect data and display it on a scatter plot. Which quantities are the best to use for the x- and y-values of the points on the scatter plot? A. x = the number of dollars spent on advertising, and y = the total cost to make the toys B. x = the number of dollars spent on advertising, and y = the total sales of toys in dollars C. x = the total sales of toys in dollars, and y = the number of dollars spent on advertising D. x = the total sales of toys in dollars, and y = the total cost to make the toys