For this case we have that by definition, the point-slope equation of a line is given by:

Where:
m: It's the slope
It is a point through which the line passes
According to the statement data we have:

Substituting we have:

By law of signs of multiplication we have to:

Answer:
The requested equation is: 
You need to know the equation of motion for the particle.
Step-by-step explanation:
u can try putting the value one by one to check
or write
(12x +14 ) = ( 9x-×)
and solve it do u will get the answer
You can subtract the 2x to make it -y=-2x-2 and add the x to make it -2y=x+4. for elimination method multiply the equation (-2)-y=-2x-2. Hope this helps. You can also do substitution method
Depending on how big the center is, I would say 15.
I hope this helped!