Find any number n such that, for every n \geq n, one has n^3 + 100n^2 + 5n > 4 * 109. prove that your choice of n 'works'.

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

the function makes a strait line horizontally with no x intercept but a y intercept at 9.