Write the probability scale.

Hey DAVID — ready when you are.

Step 1: Write the probability scale. The probability scale ranges from $0$ (impossible) to $1$ (certain). It can be described using words: $Impossible \rightarrow Unlikely \rightarrow Even Chance \rightarrow Likely \rightarrow Certain$ Numerically, this corresponds to: $0 \rightarrow between 0 and 0.5 \rightarrow 0.5 \rightarrow between 0.5 and 1 \rightarrow 1$ The probability scale from impossible to certain is: $\boxed{Impossible \rightarrow Unlikely \rightarrow Even Chance \rightarrow Likely \rightarrow Certain}$

Step 2: Give an example of an impossible event. An impossible event is one that cannot happen. Example: Rolling a 7 on a standard six-sided die.

Step 3: Give an example of a certain event. A certain event is one that will definitely happen. Example: The sun rising tomorrow.

Step 4: Give an example of an event that might happen. An event that might happen has a probability between $0$ and $1$. Example: Flipping a coin and getting heads.

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