you agree that the `4 unit by 8 unit shaded rectangle` has an area of 8*4 = 32 square units, right?
i believe so
are you able to solve the equation `32k = 288` for k ?
but ill try
divide both sides by 32
128 and 256
288/32 = ??
now we take the square root of this to get sqrt(9) = 3
the scale factor is 3 what does this mean? it means that 1 unit on the paper is equal to 3 feet in the real world