What does this mean by the 'growth factor' for part A? How is the growth factor different from the growth rate (if it's different at all)?

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

table 3 represents a direct variation function. : )

47 - 90 = 43

43 - 180 = x

x = 137