The general form of the equation of a line is y = mx + b, where m is the slope and b is the y-intercept.

The slope (m) of a line through two points (x1, y1) and (x2, y2) is calculated using the formula m = (y2 - y1) / (x2 - x1).

The y-intercept is the point where the line crosses the y-axis, represented by the value of b in the equation y = mx + b.

A line with a slope of 0 is horizontal, indicating that the y-value remains constant regardless of the x-value.

The slope of a vertical line is undefined because the change in x is 0, leading to division by zero in the slope formula.

You can use the point-slope form of the equation: y - y1 = m(x - x1), where (x1, y1) is the point and m is the slope.

The slope-intercept form of a line is y = mx + b, where m is the slope and b is the y-intercept.