Answer:
y=-4x+b
Step-by-step explanation:
The way u write it is y=mx+b
The area of one of the triangular lateral faces is

You're told that the slant height, which is the same as the height of the triangular face, is 9.8, so you have

where

is the length of the base of the triangle, which is also the same as the side length of the base of the pyramid. So


OK, we'll go in steps. First a reflection through the x axis, which negates y.

Now a vertical scaling of 2/3

Now we shift seven units to the right,

Now down five,

There it is.
Answer: reflection thru x axis, vertical scale 2/3, right shift 7, down 5, second choice