What is the definition of common factor

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Does anyone know how to do geometryme with this problem

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?