There are 25 different amount of points, but there are 8 in the 8-11 points category. That means that most likely Nate will score 8-11 with a 8/25 chance that he will.
To be a function for every identical x value it has to have a different Y value. If the set has two identical X values but they have different Y values it can't be a function.
Since we know that a triangle totals 180 degrees, we can easily figure out the third angle. Since each measure 34 degrees, simply multiply by 2. You get 68 degrees. Then you do 180-68 to get 112.