We have the next formula to calculate the slope between two points
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
where (x1,y1) is one point and the other point is (x2,y2)
in our case
(9,-2)=(x1,y1)
(6,4)=(x2,y2)
we substitute the values in the formula
[tex]m=\frac{4+2}{6-9}=\frac{6}{-3}=-2[/tex]
the slope is -2
