Butwhat if x is -4 and y is -1 (-4,-1)
would the height of the triangle still be 2?
I apologize if this may seem a stupid question but when I drew this out it wasnt clear hence the confusion with this question.
Since the line joining (1,1,) and (4,1) is parallel to x-axis, this can be treated as the base.
For the third vertex, it is the y co-ordinate that will decide the height of the triangle. If the y co-ordiate of 3, height of triangle is 2. If y-co-ordiate is -1, then also, height of triangle is 2.