Linear relations describe a relationship between two variables that can be represented by a straight line on a graph. In this context, one variable is dependent on the other, meaning that changes in one variable will directly affect the other. The equation of a linear relation is typically written in the form y = mx + b, where m represents the slope of the line and b is the y-intercept. These relations are commonly used in various fields, such as mathematics, economics, and science, to model real-world situations. For example, if you were to plot the relationship between time and distance traveled at a constant speed, the resulting graph would show a linear relation, indicating that distance increases steadily as time progresses.