answer:
the answer to the question is c) 14.1
Answer:

Step-by-step explanation:
we know that
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)
step 1
Find the slope of the given line
we have

isolate the variable y


the slope of the given line is

step 2
Find the slope
of the perpendicular line to the given line

---> slope of the given line


therefore
The value of m is

Answer:
the square of a positive number is always positive