When it is raining outside, you tend to stay in and watch TV. The number of hours of TV that you watch in a given week is twice the number of rainy days in that week. In the equation below, y is the number of hours of TV you watch in a week, and xxx is the number of rainy days in that week. The relationship between these two variables can be expressed by the following equation:
y=2xy=2xy, equals, 2, x