Answer:
The value of y is y = -8x + 1.
Step-by-step explanation:

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Since there are 8 boats (2 yachts + 6 barges) the three partial products would be as follows:
100 * 8
20 * 8
6 * 8
These are from taking the gallons of fuel for each boat that are needed and breaking it into the place values.
(100*8) + (20* 8) + (6*8) =
800+160+48=
1008 gallons of fuel are needed.
First one go 5 up
second one go 18 up
third one go 20 up
fourth one go 17 up
fifth one go 16 up
sixth one go 23 up
seventh one go 19 up
tenth one go 14 up
eleventh one go 8 up
twelfth one go 8 up
thirteenth one go 6 up
fourteenth one go 12 up
fiftheenth one go 20 up
sixteenth one go 14 up
seventeenth one go 18 up
this was the best I could explain
use the numbers as the question shows
I hope I helped
you know that y=mx +c then in the place of m is 3 then answe is also three.