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
Answer:C
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