यदि (y=220+ax) में (x=9) से (x=17) तक (y) (144) बढ़ता है, तो (a) क्या है?
If in (y=220+ax), (y) increases by (144) from (x=9) to (x=17), what is (a)?
Explanation opens after your attempt
C. (18)
Concept
The change in (x) is (8). From (8a=144), (a=18).
Why this answer is correct
The correct answer is C. (18). The change in (x) is (8). From (8a=144), (a=18).
Exam Tip
(x) में परिवर्तन (8) है। (8a=144) से (a=18) मिलता है।
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