Referenced from lesson Sam the Butterfly - Applying Inequalities

Open the “Sam the Butterfly” starter file and press “Run”. (Hi, Sam!)

Move Sam around the screen using the arrow keys.

1 What do you notice about the program?


2 What do you wonder?


3 What do you see when Sam is at (0,0)? Why is that?


4 What changes as the butterfly moves left and right?


Sam is in a 640 × 480 yard. Sam’s mom wants Sam to stay in sight.

How far to the left and right can Sam go and still remain visible?

Use the new inequality functions to answer the following questions with code:

5 Sam hasn’t gone off the left edge of the screen as long as…

6 Sam hasn’t gone off the right edge of the screen as long as…

7 Use the space below to draw Circles of Evaluation for these two expressions:

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