Is the relation a function and why or why not? HINT: draw a vertical line ( ).
A. Yes, the lines are straight.
B. Yes, every relation is a function.
C. Yes, the function passes the vertical line test.
D. No, the function fails the vertical line test.

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.