15 square feet because the scale is 2 in:1 ft so it would be 10/2 which is 5. This means the flag is 5 ft x 3 ft aka 15 square feet
30 x 0.33 = 9.90 And that's the answer
So now its

but you want it in y=mx+b so
add x to both sides so that you have y on its own
so now it's
82.2
Add all of them up and then divide by 10.