Linear curves, often represented by straight lines on a graph, describe a relationship between two variables that change at a constant rate. The equation of a linear curve is typically written in the form y = mx + b, where m represents the slope and b is the y-intercept. This means that for every unit increase in x, y changes by a fixed amount. In real-world applications, linear curves can model various phenomena, such as distance traveled over time at a constant speed or the relationship between income and expenses. Understanding linear curves is essential in fields like mathematics, economics, and science.