You can find equivalent ratios<span> by multiplying or dividing both sides by the same number</span>
The answer to this question would be:
f(x) = 7 + 0.3x
Because 2 pounds will cost you $7, the $7 is required. If x is the number of ounces over 2 points and each ounce is 30 cents, it would only seem reasonable to multiply the ounces by 30 cents, right? Right. Therefore you add the 0.3x and you come towards the correct answer.
It would be 1:20 proportional to 4:5
1 - TRUE
2 - FALSE
3 - 6 or 14
4 - d/t=r
8,000,000 would be the answer to 4000x2000. Hope this helps!