To determine the location of a point on a graph, the first number of the ordered pair is a x-coordinate which means the first number you would look for would be the horizontal line, or the x-axis. The second number is the y-coordinate which means that you would look on the vertical line, or the y-axis. You would go on the horizontal line first, then from there go up to the y-coordinate and place your point. (I'm sorry if it's long but you can try to shorten it.)
Hope this helped!
Have a nice day!
The coordinates of the midpoint if the endpoints are (x₁,y₁) and (x₂,y₂):

One endpoint is (3,5), the midpoint is (5,-11). The other endpoint is (x,y).

The coordinates of endpoint M are (7,-27).
(-2x)(x^2)+(-2x)(-3) = -2x^3 + 6x