Question 12
Coordinate GeometryIf m is the gradient of the line pq − px − qy = 0 and q ≠ 0, find 1/m
- A.q/p
- B.p/q
- C.−q/p
- D.−p/q
Show the answer and explanation
Answer: C (−q/p)
Explanation
qy = −px + pq, so y = (−p/q)x + p. m = −p/q and 1/m = −q/p.
If m is the gradient of the line pq − px − qy = 0 and q ≠ 0, find 1/m
Answer: C (−q/p)
qy = −px + pq, so y = (−p/q)x + p. m = −p/q and 1/m = −q/p.