1. **Problem Statement:** Determine if scatterplot 7 has a linear or non-linear trend line. 2. **Understanding Scatterplots:** A scatterplot shows data points plotted on a coordinate plane. The trend line represents the general direction of the data. 3. **Key Rule:** - If points roughly form a straight line, the trend is linear. - If points form a curve or arch, the trend is non-linear. 4. **Analysis of Scatterplot 7:** - The points form a curved arch shape. - This indicates the relationship between variables is not a straight line. 5. **Conclusion:** - Scatterplot 7 has a **non-linear** trend line.