Which situation can be represented by the equation y= 13x? A- A bakery sells. x number of cakes for $13.00 each. The cost is y, for x number of cakes.

B-Sandra has been in ballet for x years. This is 13 times y, the number of years her mother has done ballet.

C-Tom is x, xears old. His age. is 13 years greater than y, his brother's age in years.

D-John spent x dollars to buy a purse for his sister. He gave the cashier y dollars and
received $13 back in change.

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.