Q4Multiple choiceExercise 7.1
3 2 2 17. A line intersects the y-axis and x-axis at the points P and Q, respectively. If (2, –5) is the mid-point of PQ, then the coordinates of P and Q are, respectively
- (A)(0, – 5) and (2, 0)
- (B)(0, 10) and (– 4, 0)
- (C)(0, 4) and (– 10, 0)
- (D)(0, – 10) and (4, 0) 18. The area of a triangle with vertices (a, b + c), (b, c + a) and (c, a + b) is (A) (a + b + c)2 (B) 0 (C) a + b + c (D) abc 19. If the distance between the points (4, p) and (1, 0) is 5, then the value of p is (A) 4 only (B) ± 4 (C) – 4 only (D) 0 20. If the points A (1, 2), O (0, 0) and C (a, b) are collinear, then (A) a = b (B) a = 2b (C) 2a = b (D) a = –b
Show answer
(B) (0, 10) and (– 4, 0)