What is a large raised area that rises above the surrounding ground

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?

Find the measure of the missing angle

What is the slope of the line that has an equation of y equals x -3