Question

Emme bought cashews that cost $3.42 per pound. Which of the following does this situation represent?

a relation only

a function only

neither a relation nor a function

both a relation and a function

Answer 1

k

Answer 2

Old question, answering to close

Let's let x = the # of lbs of cashews, and y = the cost

each lb of cashews is $3.42, so y = 3.42x.

this means if we input some value x, the y-value will be exactly 3.42x. because each value in the domain, x, is only assigned to one y-value, this is a function. by definition, all functions are relations, so this is both a relation and a function.