The function slope will compute the slope of a line determined by two points, or by an equation.

The command with(geometry,slope) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{geometry}\right)\:$

$\mathrm{line}\left(l\,y=3x+5\,\left[x\,y\right]\right)$

$l$

$\mathrm{slope}\left(l\right)$

$3$

$\mathrm{point}\left(A\,1\,8\right),\mathrm{point}\left(B\,-1\,2\right)\:$

$\mathrm{slope}\left(A\,B\right)$

$3$