To reflect a function across the x axis, we want to turn all the x values that were once positive negative and vice versa. That means we want f(-x), which is: 
The answer is B.
There are about 391,000 of plants currently known to science.
Hope this helps.
D. Give performers an unfair advantage
Let’s talk about option A; Drugs that athletes take (for e.g. steroids) they INCREASE athletes muscle mass & endurance. They look bigger & muscular than a normal natural athlete.
Option B is also incorrect because there is no drugs that are legal in sports
Option C - It increase the athletes performance and your extremely energetic. You are doing what an natural cannot do in a short period of time.
SO OPTION D - It’s unfair to the natural ones
Place one point 7 units above D and one 7 units below D. So at (-4,8) and (-4,-6)