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
Question 20
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)
Let co-ordinates of P be (0, y)
Let co-ordinates of Q be (x, 0)
Since A (2, −5) is mid-point of PQ
(2,−5)=((0 + 𝑥)/2,(𝑦 + 0)/2)
(2,−5)=(𝑥/2,𝑦/2)
Comparing x and y coordinates
2 = 𝑥/2
2 × 2 = x
x = 4
−5 = 𝑦/2
−5 × 2 = y
y = −10
Thus,
Coordinates of P = (0, y) = (0, −10)
Coordinates of Q = (x, 0) = (4, 0)
So, the correct answer is (D)
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Davneet Singh
Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.
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