A sunflower is 30 inches tall and grows 40 inches each month. The sunflowers height is a linear function of time. which statement best describes the rate of change and initial value of this function

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?