A ream of paper costs $5.45. What is the constant of proportionality ? Write an equation for this relationship, where c is the cost and r is the number of reams. Remember , the equation for a proportional relationship is in the form of y = kx , where k is the constant of proportionality.

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done