The missing reason for step 2 is b. application of the slope formula
What is the missing reason for step 2?
From the question, we have the following parameters that can be used in our computation:
The proof of the line relationship
Where, we have that
The lines are perpendicular
In step 1, the given parameters are stated
This means that the next step is to apply the slope formula
This is done by:


Hence, the missing reason for step 2 is b. application of the slope formula