Identify the slope and y-intercept of the graph of the equation. y = 4/5x + 1

A. slope: 4/5; y - intercept: -1

B. slope: 4/5; y - intercept: 1

C. slope: 5/4; y - intercept: 1

D. slope: 5/4; y - intercept: -1

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