यदि (y=85-3.5x), तो (x=4) से (x=12) तक (y) में कुल कमी कितनी होगी?
If (y=85-3.5x), what is the total decrease in (y) from (x=4) to (x=12)?
Explanation opens after your attempt
C. (28)
Concept
The change in (x) is (12-4=8). The total decrease is \(3.5\times8=28\).
Why this answer is correct
The correct answer is C. (28). The change in (x) is (12-4=8). The total decrease is \(3.5\times8=28\).
Exam Tip
(x) में परिवर्तन (12-4=8) है। कुल कमी \(3.5\times8=28\) है।
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