Respuesta :

reahanajoseph
9 is the answer

First line = 9.2
Second one = 18
mhanifa

Answer:

9

Step-by-step explanation:

mean of plot 1

  • (2+3+3*5+9+11+14+15+21)/10= 9

mean of plot 2

  • (7+12+2*16+18+2*20+25+28)/9= 18

the difference

  • 18-9= 9

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