What is coefficient correlation

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?