We can use the Midpoint Formula to find the missing endpoint by splitting the usual formula into two separate equations, one for the x-coordinate and one for the y-coordinate.
M(x_1+x_2/2, y_1+y_2/2)
⇕
x_M=x_1+x_2/2 and y_M=y_1+y_2/2To find x_2, we can use the x-coordinate of the midpoint, which is x_M= - 1, and the x-coordinate of the given endpoint, which is x_1= - 7.
The x-coordinate of the endpoint Q is 5. Now, we will determine its y-coordinate by following a similar process. The y-coordinates of the midpoint and given endpoint are 4 and 10, respectively.
