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In the electricity example, which is the independent variable?
AQuantity unpaid
BQuantity unread
CQuantity unseen
DQuantity used
Answer & Solution
Correct answer: D. Quantity used
1. One quantity is chosen or controlled.
2. The bill follows from it.
3. The quantity of electricity is an independent variable, and the amount of the bill is dependent.
4. So the answer is quantity used.
_Source: NCERT Class 8 Mathematics, Ch 13 'Introduction to Graphs'_
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