PHONE CARDS You purchase a 300 minute phone card. The function M(w) = -30w + 300 models the number M of minutes that remain on the
card after w weeks. Describe how to determine a reasonable domain and
range. Graph the function. How many minutes per week do you use the card?

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?