Answers

2016-07-16T22:47:27+08:00
F(x)=7+(x-3)
f(x)=x+4

f(6)=6+4
=10.00
and so on...
therefore,
6km is 10.00, 3km is 7.00, and 10km is 14.00

thanks :) by:EEPJR
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