I am having a hard time with this problem

Question

3. You are going to plant trees in your hilly backyard. Tree A is located at coordinates (1,2) and Tree B is located at (3,12). What is the slope of the hill between the two trees? Show how you arrived at your answer

Answer 1

slope: change in y/change in x

(12-2)/(3-1)

Answer 2

Thank you making me understand that better