Question

what is the slope of (-12, 8) and (10, 11)

Answer 1

use the slope formula:\[m=\frac{ \Delta y }{\Delta x }=\frac{ y _{2}-y _{1} }{x _{2}-x _{1}}\]

Answer 2

in addition to what @Data_LG2 said
(-12,8) is (x1,x2)
and (10,11) is (y1,y2)