Hellpp pls

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

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?

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?