✓ Lesson Check

Do you know HOW?

1. Graph each set of ordered pairs. Use words to describe the pattern shown in the graph.

   1. (0, 0), (1, 1), (2, 2), (3, 3), (4, 4)
   2. (0, 8), (1, 6), (2, 4), (3, 2), (4, 0)
   3. (3, 0), (3, 1), (3, 2), (3, 3), (3, 4)

2. Use the diagram below. Copy and complete the table showing the relationship between the number of squares and the perimeter of the figure they form.

   

   Number of squares	Perimeter
   1	4
   2	6
   3	□ white square
   4	□ white square
   10	□ white square
   □ white square	62
   n	□ white square

Do you UNDERSTAND?

3. Vocabulary The amount of toothpaste in a tube decreases each time you brush your teeth. Identify the independent and dependent variables in this relationship.
4. Reasoning Tell whether each set of ordered pairs in Exercise 1 represents a function. Justify your answers.
5. Reasoning Does the graph below represent a linear function? Explain.