Reasoning The equation below describes a proportional relationship between x and y. What is the constant of​ proportionality? Use pencil and paper. Explain why your answer is called the​ "constant of​ proportionality."

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189