How do you make an equation of a line?

To create an equation of a line, you typically use the slope-intercept form, which is (y = mx + b), where (m) is the slope and (b) is the y-intercept. First, determine the slope by calculating the change in y over the change in x between two points on the line. Next, identify the y-intercept, where the line crosses the y-axis. Finally, substitute these values into the equation to get the line's equation.