Eddie is correct about his prediction. A coin has two sides, one head, one tail, so there is a 50% chance that it will land heads every time Eddie flips the coin. I would tell Eddie that his prediction is reasonable and mathematically correct.
Answer:
Slope = -1
Step-by-step explanation:

That is the exact representation of the constant π. By definition:
π=C/d, where C is the circumference of a circle and d is the diameter.