1. Based on the scatter plot trend from 1999 to 2005, if the trend continued, approximately 750 million CDs would be sold in 2006.
2. The scatter plot shows a positive linear relationship: as a child’s age increases, the annual cost to raise them also increases. The points form an upward-sloping pattern.
3. The line of best fit for the given data has the equation y = -x.
4.
a. The scatter plot shows a positive correlation: as study hours increase, exam grades tend to increase.
b. The equation for the line of best fit is approximately y = 8x + 60.
c. For a student who studied 6 hours, the predicted grade is 108.
d. No, this line cannot go on forever because grades are capped at 100%, and studying more than a certain point may not yield higher scores due to diminishing returns or test limits.
Parent Tip: Review the logic above to help your child master the concept of scatter plots worksheet 1.
