Question

There are 450 families in the Lincoln Valley neighborhood, and 40% of them own pets. Draw a double number line that can be used to find the number of families who own pets.

Answer 1

Using a double number line, the student can visually represent the relationship between the total number of families (450) and the percentage that own pets (40%) to find that 180 families in Lincoln Valley own pets.

Step-by-step explanation:

The student needs to find the number of families who own pets in the Lincoln Valley neighborhood, knowing there are 450 families, and 40% of them own pets. To do this, the student can use a double number line. A double number line is a visual representation that shows two sets of numbers lined up alongside each other to show a ratio or a percentage relationship.

Here is how the double number line would be drawn:

1 One line represents the total number of families in Lincoln Valley, starting at 0 and going up to 450.

2 The second line represents the percentage of families who own pets, starting at 0% and going up to 100%.

Marking 40% on the percentage line directly below the total number of families would then show the number of families who own pets.

In this case, 40% of 450 families equals to 180 families owning pets, as 40% of 450 is 0.40 × 450 = 180.