It would be equal to 4
Hope this helps!
The linear function is: g = 3n-2. Plug in values from -2 to 4 into n. Like so, G = 3(-2)-2 = g = -8. So, n(x) = -2 and g(y) = -8. And so on, and so on.
Basically, your n values are the x values.
The number you get out of the equation will be your y value.
Given two points 
, the slope of the line passing through the two points is
So, in your case, you have
448 films. You get the answer by multiplying 700 by 64%
