At the deli counter in the supermarket, Nigel paid $10 for 2 1/2 pounds of roast beef. The cost of deli meat is proportional to its weight. What is the equation for the graph of this proportional relationship? (1 point)

Answer 1

Let x be the weight of the roast beef in pounds and y be the cost of the roast beef.

We are given that Nigel paid $10 for 2 1/2 pounds of roast beef. Therefore, the cost per pound of roast beef is $10/(2 1/2) = $10/(5/2) = $10 * (2/5) = $4.

Therefore, the equation for the graph of this proportional relationship is y = 4x