A regression equation is y = 3x + 10. If x increases by 5, how much does y increase?
✓ Correct Answer: Option B
For each unit increase in x, y increases by 3 (the slope). For 5 units: 3 × 5 = 15.
For each unit increase in x, y increases by 3 (the slope). For 5 units: 3 × 5 = 15.