Ex 2).
Write a direct variation equation.
a) Suppose y varies directly with x and y = 40 when x = 8 . What direction
variation equation relates x and y ? What is the value of y when x = 12 ?
b) Suppose y varies directly with x and y = 10 when x = 2 . What direct
variation equation relates x and y ? What is the value of y when x = 15 ?
c) Suppose n varies directly with p and n = 9 when p = 5 . What direct
variation equation relates n and p ? What is the value of n when p = 8 ?
d) Suppose v varies directly with k and v = 6 when k = 14 . What direct
variation equation relates v and k ? What is the value of k when v = 8 ?