Find the slope of the line through each pair of points please

Angela rode his bike around a bike trail that was 1/4 of a mile long he rode his bike around the trail 8 * angelo says he wrote a total of 8/4 miles to russell says he's wrong and he actually and says that he actually wrote to my who is corrupt use words and trying to explain how you know.

Does anyone know how to do geometryme with this problem

Hi, can anyone show me how to do this problem? 100 points for this. in advance