I would say its A but I'm not 100%
Answer:
you have to divide by 4 not subtracted.
Step-by-step explanation:
we know that
The formula to calculate the slope between two points is equal to
![m=\frac{y2-y1}{x2-x1}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7By2-y1%7D%7Bx2-x1%7D)
<u>Part a) Find the slope of line PQ</u>
![P(-8,2)\ Q(4,2)](https://tex.z-dn.net/?f=P%28-8%2C2%29%5C%20Q%284%2C2%29)
substitute in the formula
![m=\frac{2-2}{4+8}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B2-2%7D%7B4%2B8%7D)
![m=\frac{0}{12}=0](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B0%7D%7B12%7D%3D0)
Any line parallel to X-axis has slope equal to zero
so
the line PQ is parallel to the x-axis
therefore
<u>the answer Part a) is </u>
![0](https://tex.z-dn.net/?f=0)
<u>Part b) Find the slope of line MN</u>
![M(8,6)\ N(8,-8)](https://tex.z-dn.net/?f=M%288%2C6%29%5C%20N%288%2C-8%29)
substitute in the formula
![m=\frac{-8-6}{8-8}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B-8-6%7D%7B8-8%7D)
![m=\frac{-14}{0}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B-14%7D%7B0%7D)
Anything divided by zero is undefined
m=undefined
therefore
<u>the answer Part b) is </u>
undefined
<u>Part c) How are the two lines related ? </u>
we know that
Any line perpendicular to X-axis has slope undefined
Because the term
will always be zero
so
<u>the answer Part c) is</u>
the lines are perpendicular
Answer:
the answer is c, hope this helps