It's simple bud. First you have to distribute the 4/9.
y-2=4/9(x-3)
y-2=4/9x-1.33 (then leave the y by itself)
y=4/9x-1.33+2
y=4/9x+0.67 done!
It can hold 9 ounces of oil and 90 ounces of gasoline cause if you take 10 oz of gas and times it by 9 it equals 90 and if you take 1 oz of oil and times it by 9 it equals 9 then take 90+9=99
Total profit = total amount earned - cost of ingredients
P = 5s - 1160