Cassandra is leaving college to go home for the summer she lives 424 miles away from home and arrive in 8 hours. which ratio shows her rate of travel in simplest form

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis