In the point-slope equation \( y - Y_1 = m (X - X_1) \):
- \( Y_1 \) represents the y-coordinate of a specific point on the line.
- \( m \) represents the slope of the line.
- \( X_1 \) represents the x-coordinate of that specific point on the line.
To summarize:
- \( Y_1 \) = y-coordinate
- \( m \) = slope
- \( X_1 \) = x-coordinate