what you do is like this
w is direcly proprotional to y means
w=k/y
w is inversly propotional to x^2 means
w=kx^2
19.a.
y=4
w=14
14=k4
56=k
therefor
w=56/y
if y=9
find w
w=56/9
w=6 and 2/9
b.
x=2
w=5
5=k2^2
5=k4
5/4=k
1.25=k
so
w=1.25x^2
x=10
w=1.2510^2
w=1.25100
w=125
sorry got to go
