Sam can type 368 words in 8 minutes. What is the constant of proportionality that relates the number of words typed, y, to the number of minutes it took to type those words, x?

The constant of proportionality can be found by dividing the number of words typed by the number of minutes it took to type those words.

Constant of proportionality = Number of words typed / Number of minutes

Constant of proportionality = 368 / 8 = 46.