Answer:
![Slope\:\: \overline{AC} =1](https://img.qammunity.org/2021/formulas/mathematics/college/kqbmylbl4s3eher2vvwu2uhjjw0r5tg7uh.png)
Explanation:
A is on the same point on the x-axis as B and the same point on the y-axis as D
- Therefore, the coordinate of A is (0,0)
C is on the same point on the x-axis as D and the same point on the y-axis as B.
- Therefore, the coordinate of C is (a,a)
We are to determine the slope of the line joining A to C.
![Slope, m =(y_2-y_1)/(x_2-x_1) \\(x_1,y_1)=(0,0),(x_2,y_2)=(a,a)\\$Therefore, Slope of AC$\\m =(a-0)/(a-0)\\=(a)/(a)\\\\=1](https://img.qammunity.org/2021/formulas/mathematics/college/5mj1byov9fazu43086a61degz9eik4hr0o.png)
![Slope\:\: \overline{AC} =1](https://img.qammunity.org/2021/formulas/mathematics/college/kqbmylbl4s3eher2vvwu2uhjjw0r5tg7uh.png)