The gradient of one of the lines of is twice that of the other then
Explanation for the correct answer:
Find the relation between and for the given condition.
Assume that, and be the slope of the lines represented by .
We know that,
Also,
Since, it is given that, the slope of one line is twice the slope of the other line.
That is,
So, equation becomes:
Also, equation becomes:
From equation and , we get
Therefore, the relation between and when the slope of one line is twice the slope of the other line is .
Hence, option is the correct answer.