Since it is 0.5 per serving between 0 and 8 ounces the graph would intersect at (1, 0.5) and it does for B. And then it says $4 for any serving 8 oz and 12 oz. B shows that the line changes to 4 dollars when it reaches 8 oz. Sorry for the terrible explanation.
The answer is (B), because the rate of the function is 0.50 from 0 to 8 ounces, thus the line should have a slope of 1/2. But afterward, it levels off horizontally as every ounce above 8 ounces to 12 ounces is $4.
If you ask questions while their speaking it shows that you are paying attention to them. Avoiding eye contact could mean your thinking about something else or you aren't interested. Interrupting them is just being disrespectful. Leaning towards them doesn't really do anything other than you moving.
