कौन सी रेखा ((0,18)) पर (y)-अक्ष काटती है और (x) के (7) बढ़ने पर (y) (49) घटाती है?
Which line cuts the (y)-axis at ((0,18)) and decreases (y) by (49) when (x) increases by (7)?
Explanation opens after your attempt
B. (y=-7x+18)
Concept
The slope is \(-\frac{49}{7}=-7\) and the (y)-intercept is (18). So (y=-7x+18) is correct.
Why this answer is correct
The correct answer is B. (y=-7x+18). The slope is \(-\frac{49}{7}=-7\) and the (y)-intercept is (18). So (y=-7x+18) is correct.
Exam Tip
ढाल \(-\frac{49}{7}=-7\) है और (y)-अवरोध (18) है। इसलिए (y=-7x+18) सही है।
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