Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar. Line AB and line BC form a right angle at their point of intersection, B. If the coordinates of A and B are (14, -1) and (2, 1), respectively, the y-intercept of line AB is and the equation of line BC is y = __x + __ .
If the y-coordinate of point C is 13, its x-coordinate is ___ .