The values of y for which the distance between the points P(10, y) and Q(2, 2) is 10 unit.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → -4 and 8
By the distance formula, (10 − 2)2 + (y − 2)2 = 102, that is 64 + (y − 2)2 = 100.
So (y − 2)2 = 36 and y − 2 = ±6, giving y = 8 or y = −4.