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1

Observe the tables given below and in each one find whether x and y are proportional:

(i)

x | 3 | 5 | 8 | 11 | 26 |

y | 9 | 15 | 24 | 33 | 78 |

(ii)

x | 2.5 | 4 | 7.5 | 10 | 14 |

y | 10 | 16 | 30 | 40 | 42 |

(iii)

x | 5 | 7 | 9 | 15 | 18 | 25 |

y | 15 | 21 | 27 | 60 | 72 | 75 |

2

If x and y are directly proportional, find the value of x_{1,} x_{2} and y_{2} in the table given below:

X | 3 | x | x | 10 |

Y | 72 | 120 | 192 | y |

1

Observe the tables given below and in each case find whether x and y are inversely proportional:

(i)

X | 6 | 10 | 14 | 16 |

Y | 9 | 15 | 21 | 24 |

(ii)

X | 5 | 9 | 15 | 3 | 45 |

Y | 18 | 10 | 6 | 30 | 2 |

(iii)

X | 9 | 3 | 6 | 36 |

Y | 4 | 12 | 9 | 1 |

2

If x and y are inversely proportional, find the values of x_{1}, x_{2}, y_{1} and y_{2} in the table given below:

X | 8 | x | 16 | x | 80 |

Y | y | 4 | 5 | 2 | y |