Determine the global extreme values of the function f(x, y)=x3+x2y+7y2
f(x, y)=x3+x2y+7y2 on
x, y≥0, x+y≤3.
x, y≥0, x+y≤3. (Use symbolic notation and fractions where needed.)

Which of the following best describes the graph below? + + 2 + 3 + 4 1 o a. it is not a function. o b. it is a one-to-one function. o c. it is a many-to-one function. o d. it is a function, but it is not one-to-one.