Draw a graph to see the question more clearly.1) Find the slope using the rise over run formula. ( m = 1/2 )Put this slope into the equation of a line formula along with one of the points. ( y = (1/2)*x + 1 )2) To find perpendicular the slope must be the opposite, therefore *-1. ( m = -1/2 )Put this new slope into the equation of a line formula along with point 'B'. ( y = -(1/2)*x + 11 )