Entirely possible, yes.
That is irrelevant, there is not possible way y=xy, and there is no possible way xy=x.
The 3 possible answers are Quadrant 3 and Quadrant 4 and y-axis
Possible, but unlikely.
It is not possible to answer the question without the numerical value of Y.
Yes, it is a straight line
y's is possible
Domain is what you can plug into the function (possible x values for y=f(x) type functions) and range is the possible values you can get out (possible y values).
The range of y=2x is All Real Numbers
It is quite possible, depending on X, a and y.
You are looking for max(x*y) when x+y=10, x > 0, y > 0, x and y in natural numbers.Find all possible (x,y) values that realizes above constraints, and pick the one that gives largest x*y
Call the width x and the height y. Then expressing the area in function of x and y gives: x*y=40 or y=40/x It is now possible to choose any width (x) and calculate the height (y) needed to get an area of 40.