Answer:
Step-by-step explanation:
In this question, we have to find the slope with the given coordinates.
To find our slope, we would use the slope formula: 
Plug in your coordinates and solve:

Simplify the fraction:

The slope would be 
Answer:
The one on the right
Step-by-step explanation:
The height on the right one matches the height on the net, unlike the left one
Answer:
The area is 6.25 times greater.
Step-by-step explanation:
Each side of the triangle of the dilated triangle will be 2.5 times the length of the original sides.
The area will increase to 2.5^2 = 6.25 times.
Y = -2m -1 is your equation