50 POINTS FOR THIS IF ANYONE CAN GIVE ME A DECENT ANSWER AND BRAINIEST ANSWER help me sketch the graph of x/4 + y/-3 = 1?

give me a reason why you put a mark there on graph thanks.
PLEASE

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.