Answer: The given equation is Y = -10x + 300.
The rate of change of this equation refers to the rate at which Y changes as x changes. This is the same as the slope of the line represented by the equation.
The equation is in the form of y = mx + b, where m is the slope and b is the y-intercept. So, we can see that the slope of the line is -10. This means that for every one unit increase in x, y decreases by 10 units.
Therefore, the rate of change of Y with respect to X is -10.