Question

Peaches are being sold for $2 per pound.The customer created a model to represent the total cost of peaches bought. If x represents the number of pounds of peaches bought and y represents the total cost of the peaches, which best describes the values of x and y?

The values of both x and y can be any real number.
The values of both x and y will be real numbers greater than or equal to 0.
The value of x and y will always be zero

Answer 1

The second choice. Since x (pounds bought) cannot be negative and y = 2x (dollars) is nonnegative too, both x and y are real numbers greater than or equal to 0.