Slope of the line $$$y = 7 - 3 x$$$

The slope of the line $$$y = m x + b$$$ equals $$$m$$$.

Write the line in the form $$$y = m x + b$$$: $$$y = - 3 x + 7$$$.

So, the slope is $$$m = -3$$$.

The slope of the line is $$$m = -3$$$A.