<h2>
Answer: </h2>
The y intercept of line AB =
The equation of line AB will be
The x-coordinate of C = 4
<h2>
Step-by-step explanation:</h2>
The slope of line AB with coordinates of A and B are (14, -1) and (2, 1)
The equation of line AB will be
Put x=0, we get the i.e. is the y intercept of line AB.
Since, Line AB and Line BC form a right angle at their point of intersection, B. The the product of their slope must be -1.
Therefore, the slope of BC =
Let x coordinate of C be a,then the coordinates of C = (a,13)
Now, slope of BC with points B(2,1) and C(a,13) will be
Hence, the x-coordinate of C = 4