Y is indirectly proportional to x. when y=7, x=9
a) work out an equation connecting y and x.
b) work out the value of y when x=21

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions

i believe it is the square root of 122 because when you turn it on it's side, to where the 5 inches is on the bottom, it looks like it is the same length.