21 .
The following points (3a, 0), (0, 3b), (a, 2b) forms a

A. | triangle |

B. | straight line |

C. | equilateral triangle |

D. | None of these |

22 .
The points A(–1, 4), B(5, 2) are the vertices of a triangle of which C(0,–3) is centroid, then the third vertex C is

A. | 4, 15 | B. | 4, –15 |

C. | –4, –15 | D. | None of these |

24 .
The equation of a straight line whose inclinations is 60° and y–intercept is –2 is

A. | y = √x - 2 | B. | y = - √x - 2 |

C. | y = x/2 - 2 | D. | None of these |

25 .
The equation of a straight line passing through (6, –3) and (4,–3) is

A. | x = 4 | B. | x = 6 |

C. | y + 3 = 0 | D. | None of these |

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