Answer:

Step-by-step explanation:
The slope-intercept form of a straight line equation is y = mx + c, where m is the slope and c is the y-intercept of the line.
Now, we know that if two straight lines are perpendicular to each other then the product of their slopes will be -1.
So, the equation of a straight line which is perpendicular to the line
will be
....... (1), where c' is constant.
Given that the line (1) passes through (2,4) point.
Hence,
⇒ c' = 1.
Therefore, the final equation of the required straight line is
. (Answer)