Answer:
Step-by-step explanation:
Answer:
The Video recorders are inferior goods.
Step-by-step explanation:
As 
where;
The price of the recorders films are increasing by a term 1.07 which gives that the Price is increasing by a little. Also adding the Price of video recorder is increasing by a factor 2.1 and the Revenue or income is increasing by a term 5 (Which is high) so, revenue and price are increasing leaving the quality of the voice recorder decreasing by a large margin for maintaining the balance.
As

So, in conclusion the quality decreases and thus the video recorders are inferior goods.
Answer:
Well if you see the graph (-5, -5) is a total negative number that is in the 3 quadrant.
As for (-9,2) it goes to negative to positive.
Look at the graph and you will understand any questions ask me
hope this helps ☺
Real quick so I can sleep. it is because obtuse is over 90 degrees