Final answer:
The subject of this question is Mathematics. It involves comparing prices of chicken and beef, which can be represented graphically. The prices are proportional to the number of pounds bought.
Step-by-step explanation:
The subject of this question is Mathematics, specifically related to proportional relationships and graphing. The question asks to compare prices for chicken and beef, which can be represented by a graph. It also mentions that the prices are proportional to the number of pounds bought.
Proportional relationships involve a constant ratio between two quantities. In this case, the price of chicken and beef is proportional to the number of pounds bought. This means that the ratio of the price to the number of pounds remains constant.
For example, if the price of chicken is $2 per pound, buying 3 pounds would cost $6. If the price of beef is $3 per pound, buying 4 pounds would cost $12. In both cases, the ratio of the price to the number of pounds is $2 per pound.