Answer:[tex]\frac{b-d}{a-c}[/tex]Step-by-step explanation:Let [tex](x_1,y_1)=A(a,b)[/tex] and [tex](x_2,y_2)=C(c,d)[/tex].The slope of AC can be found using [tex]m=\frac{y_1-y_2}{x_1-x_2}[/tex]Substitute the variables to get;[tex]m=\frac{b-d}{a-c}[/tex]