The answer is 3/4.
Step-By-Step Explanation
Slope Formula:m=y2-y1/x2-x1
Substitute: 7-1/9-1
Answer: 3/4
Answer:

Step-by-step explanation:
Area of a triangle :

For,


The height of the triangle is: 
Both A and B are multiples of 5. So, I don't really understand but its either those two choices.
Sorry this doesn't really help much :/