Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar.
and 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
.