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Question

# The variable type and the correct relation between Running time (a) and Maintainance cost (z) is- Running time (a) 3 7 11 15 Maintainance cost (z) 9 17 25 33

A
z—Independent, a—Dependent and z=3a+2
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B
z—Independent, a—Dependent z=2a+3
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C
z—Dependent, a—Independent and z=2a+3
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D
z—Dependent, a—Independent and z=3a+2
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Solution

## The correct option is C z—Dependent, a—Independent and z=2a+3From the table: Running time (a) 3 7 11 15 Maintainance cost (z) 9 17 25 33 it can be observed, 3×2+3=9 7×2+3=17 11×2+3=25 15×2+3=33 hence, z=2a+3 where 'z' is dependent and 'a' is independent.

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