The next one is 16 probably
The relationship is not proportional because the boys and girls are in different grades and they are in different activities.
The reciprocal cosine function is secant: sec(theta)=1/cos(theta). The reciprocal sine function is cosecant, csc(theta)=1/sin(theta). The reciprocal tan function is cotan
Cotx=1\tanx
The answer would be x=14/3 and x=-28/3. Hope this helps!