The team has lost only 6 games (according to the comments). Let's say "x" is the amount of losses and "y" is the amount of wins.
For every loss, they have 3 wins, so in the end, this would be the equation:

or

Although the first one would be the easier and most understandable to read.
So:
y = 3(6)
would equal
18
I'm pretty sure its line c.
Step-by-step explanation:
The measure of each exterior angle = the measure of each central angle.
each angle = 360 / 16 = 22.5
Answer:
Step-by-step explanation:
the directrix is y=-1
I don't know what the vertex focus is.