alleryStart learning →Positive x, y satisfy y = 12 − x. Which test shows they are not in inverse proportion?
ATheir product varies
BTheir values are positive
CTheir product is constant
DTheir ratio is constant
Answer & Solution
Correct answer: A. Their product varies
For x = 2 the product is 20, while for x = 3 it is 27, so the product is not constant.
Keep practising Direct And Inverse Proportions
Browse all Direct And Inverse Proportions questions for ICSE Class 8, or explore more Mathematics topics.
Related questions
Can positive y vary both directly and inversely as positive x varies?A vehicle travels 60 km at 20 km/h, then 60 km at 30 km/h, with no stops. What is its averA fixed journey takes 1 hour longer at 40 km/h than at 60 km/h, with no stops. What is itsy is directly proportional to x. Increasing x from 4 to 10 increases y by 18. What is y whPositive pairs (a,b) and (c,d) satisfy b/a = d/c = k. Which new pair must have the same sePositive y varies directly with x, and z inversely with y. How does z vary with x?3 workers at equal fixed rates need 10 days. Same hours/day: fewest whole workers to finisA's fixed rate is twice B's; B needs 30 days alone. 2 A-type workers plus B work independe