कौन सी रेखा ((0,20)) पर (y)-अक्ष काटती है और (x) के (8) बढ़ने पर (y) (72) घटाती है?
Which line cuts the (y)-axis at ((0,20)) and decreases (y) by (72) when (x) increases by (8)?
Explanation opens after your attempt
B. (y=-9x+20)
Concept
The slope is \(-\frac{72}{8}=-9\) and the (y)-intercept is (20). So (y=-9x+20) is correct.
Why this answer is correct
The correct answer is B. (y=-9x+20). The slope is \(-\frac{72}{8}=-9\) and the (y)-intercept is (20). So (y=-9x+20) is correct.
Exam Tip
ढाल \(-\frac{72}{8}=-9\) है और (y)-अवरोध (20) है। इसलिए (y=-9x+20) सही है।
Login to save your score, XP, coins and progress.
