Answer:
The equation of the line with gradient -1 that passes through the point (-3, 0) can be found using the point-slope form of a line. The point-slope form of a line is given by:
y - y1 = m (x - x1)
Where m is the gradient and (x1, y1) is a point on the line.
For this line, m = -1 and (x1, y1) = (-3, 0). Thus, the equation of the line is:
y - 0 = -1 (x - (-3))
y = -x + 3