The equation of the linear regression line represents the relationship between the amount a person earns, x, and the amount saved, y. yˆ=0.01x+50 What does the slope of the line represent? For every $100 a person earns, the savings increases by 1 cent. For every $100 a person earns, the savings increases by $1. For every $1 a person earns, the savings increases by $100. For every $100 that a person earns, the savings decreases by $1.