4. Cindy is saving for a trip to Hawaii. Each
week, she puts aside the same amount of
money for her airfare. After 9 weeks of
saving, she needs $390 more for her airfare.
After 14 weeks, Cindy still needs $240.
How much is the airfare to Hawaii? How
much does Cindy put aside each week for
her airfare?

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.