The more plot point the better but you must have at least three points, a labeled X-axis and Y-axis, and a table for the data to be organized into.
Y less than 21 = 21 - y
Remember, "less than" indicates a subtraction with the terms in inverted order.
Hope I helped!
Yea that’s a nice graph i’d say looks a little fishy though
That is the centroid.
The point where the lines from each vertex of the triangle to the midpoints of the opposite sides intersect.
