Type the correct answer in each box use numerals instead of words if necessary use / for the fraction bar . ab and 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 ab is and the equation of bc is y = __ x + __ . if the y-coordinate of point c is 13 , its x-coordinate is .