Basically when you reflect something, you can think of it as a mirror, you flip it the opposite way.
Excuse my poor drawing skills, but I made a graph and a drawing of what I mean.
Answer:
Option B. 
Step-by-step explanation:
we know that
The area of a triangle is equal to
we have
Convert mixed numbers to an improper fractions
substitute the values
Just use distance formula for each point and plug it in p=a+b+c
If the width of the reactangle is x=13, the area of the rectangle is:
A(13)=2*(13)^2-5*(13)
A(13)=2*(169)-65
A(13)=338-65
A(13)=273
The area of the rectangle is 273 square units
