Not circle for sure. Line graph is for plotting not really demonstrating a change. Picto graph is just like line plotting. Probably the bar graph works the best to see the smoothness and flow of how it increases and decreases.
17.82 because you just take the 18% of 99 which is 0.18
Answer is 120 bc if the two sides are equal, so are the angles. add those and subtract that from 180 (area of a triangle) and get 120
Answer:
If you have to share 2 by 3 equally then that is saying divide, when you divide you get .6666 but if you turn it into a fraction it 2 over 3
Answer:

Step-by-step explanation:

The shifted down three units therefore c=-3