Hi
The equation y = -3x + 25 is already in its simplified form, specifically the slope-intercept form (y = mx + b). In this form, the coefficient of x (-3) represents the slope of the line, and the constant term (25) represents the y-intercept.
If you're asking whether the equation can be further simplified or reduced, the answer is no. The equation is already in its simplest form and provides a clear representation of the line that passes through the given points (-15, 70) and (5, 10).