Try proportions. It can help since it's asking for the "cost". Hope this helps! :)
No this is true because X is on 0 so it's just X and y is on 3
I do not see the exact value, but this is the formula:
The system of inequalities is:
and 
<em><u>Explanation</u></em>
Let
be the amount of live bait and
be the amount of natural bait.
As John would like to get at least 3 pounds of live bait, so the first inequality will be: 
Given that, price of live bait is $12 per pound and natural bait is $7 per pound. Also, he only has a budget of $63. That means, he can spend maximum $63
So, the cost for buying
pound of live bait
and the cost for buying
pound of natural bait 
Thus, the second inequality will be: 
Answer:
Point A would be at the coordinates, (-4, 1). Hope this helps!