Since point S (-1, -3) is the midpoint of the segment AB, the coordinates of point B are (-7, -14).
In order to determine the midpoint of a line segment with two (2) end points, we would add each end point together and then divide by two (2):
Next, we would determine the coordinate of B on line segment AB with midpoint S at (-1, -3). Let us substitute our given values into the midpoint formula as follows;
By setting up two equations to solve for our tow unknowns x₂ and y₂;
Therefore, the x-coordinate of end point B is -7.
For the y-coordinate of end point B on line segment AB, we have the following:
In conclusion, the coordinates of point B are (-7, -14).
Complete Question:
The point A (5, 8) is given. Determine the coordinates of point B, knowing that the point S (-1,-3) is the midpoint of the segment AB.