1)

a) Show that the equation for

*y*is directly proportional to the square of*x*. When*y*is 18*a*,*x*is 3.a) Show that the equation for

*y*in terms of*x*is:b) Find the value of

2)

a) Show that the equation for

*y*when*x*is 4.2)

*i*is inversely proportional to the square of*j*. When*i*is 50,*j*is 3*a*.a) Show that the equation for

*i*in terms of*j*is:b) Find the value of *j* when *i* is 18.

c) Find the value of *i* when *j* is 6*a*.

3) *y* is inversely proportional to *x*^{3}. When *y* is 8, *x* is 3*a*.

a) Show that the equation for *y* in terms of *x* is:

b) Find the value of

4)

a) Show that the equation for

*x*when*y*is 3.375.4)

*p*is directly proportional to the cube of*q*. When*p*is 400,*q*is 2*a*.a) Show that the equation for

*p*in terms of*q*is:b) Find the value of

c) Find the value of

*q*when*p*is 1,350.c) Find the value of

*p*when*q*is*a*.