a landscaping company charges $40 to mow a lawn and $15 per hour to weed garden beds. The equation that represents the amount paid to the landscaping company, A, to mow the lawn and weed the garden beds for h hours is y=15x+40

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