7/20 is already in the simplest form!
Answer:
C. -1
Step-by-step explanation:
Slope is: 
We are given the points (1,7) and (3,5).

The slope is -1, and therefore, Option C should be the correct answer.
It should be 12 teaspoons
Please correct me if I'm wrong, I'm very rusty with this part of maths.
Answer:50 meters
Step-by-step explanation: