Sivukartta Sulje Part II: Lines and proportionality 1. Drawing a line Images 2. Defining the intersection of two lines 3. Determining the slope of a line 4. The slope-intercept form y = kx + b 5. The general form of a line 6. Forming the equation of a line 7. Parallel and perpendicular lines Images 8. Speed calculations 9. Ratio 10. Proportional distribution 11. Proportions 12. Direct proportionality Mathematical models 13. Inverse proportionality 14. Revision Preliminary test I (Chapters 1–7) Images Preliminary test II (Chapters 8–13)