Answer:
It's linear, so its proportional/has a relationship.
The y/x thing means slope, so take the slope -- which is 9.
Answer:
the answer is three hundred thousand
The Answer is-2.5 because first multiply the numbers are in parentheses
Answer:
not sure of what you were asking so it's simplified below.
Step-by-step explanation:

Note: best i could do with what was given.
Answer:
Most likely C .
Step-by-step explanation:
The premium plan charges 20 dollars per cake. (+ 20) and $5 per child (5x) for pizza.
The premium plan would represent: 
The basic plan would charge $6 per child for pizza.
This would be: 
In a equation when the cost of the premium plan is the same as the basic plan,
would be the best for modeling.