Answer:
<h2><em><u>9</u></em></h2>
Step-by-step explanation :



= <em><u>9(Ans)</u></em>
The correct answer is the third one (x,y) - (-x, -y)
Answer:
C
Step-by-step explanation:
Calculate the slope m using the slope formula
m = 
with (x₁, y₁ ) = (4, 9) and (x₂, y₂ ) = (12, 20)
m =
=
→ C
Number one is correct and so is two