Step-by-step explanation:
![y=-3x^2-7x-6](https://tex.z-dn.net/?f=y%3D-3x%5E2-7x-6)
Given equation is a quadratic .
For each value of x we will get the value of y (output)
The graph of quadratic is a U shaped parabola.
For each x value there will be output y. the value of x is not repeated.
The graph of quadratic reach minimum at one point and then it goes up.
When we draw vertical line in the graph of U shaped parabola, the line crosses the graph at only one point.
So the y is a function of x
The given formula describes y as a function of x