2F)+Variation-+Direct,+Inverse,+Joint

Examples: 1) x and y vary directly. When x=3, y=15

y=kx 15=k(3) 5=k y=5x

2) p varies directly with t and inversely with s². WHen t=12 and s=3, p=2  p=kt/s²   2=k(12)/3²   18=12k   18/12=3/2=k      p=1.5t/s²=3t/2²  [|Click here for some coooooool links]    [|Clicker here for even coooooooler links]

-bishopke