What is the slope of a line that goes through the points (1, -5) and (-3, 2)? - 4/7 -7/4 -3/4 -4/3

Each weekday davina rides her bike from her house to school. after school, she rides to the library. then davina takes the same route to get home. these locations are shown on the grid below, where 1 unit on the grid represents 1 kilometer. how many kilometers does she ride each day? 10 16 20 32