15 pigs and 40 sheep
10 cows is equivalent to 2 parts of the ratio, hence
= 5 ← 1 part of the ratio, hence
8 parts = 8 × 5 = 40 ← number of sheep
3 parts = 3 × 5 = 15 ← number of pigs
Expanded: 80,000,000+9,000,000+600,000+30,000+7,000+400+20+1

Solution in attachment :
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I think its 3 - (0,10, 42)
if you put in the values of the given x, then these are the resulting y values.
It is a.1
(1+5) - 2(4(1)-1) = 0
(6) - 2(3) = 0
6 - 6 = 0
0=0