The chart compares the price of graphic T-shirts to the quantity demanded.

This chart shows the link between

interest in a product and the price a consumer pays.
interest in a product and the price a producer pays.
amount of a product and the price a consumer pays.
amount of a product and the price a producer pays.

The main reason that you should secure loose objects in your car before you drive is that a. objects too close to the engine may be affected by the heat b. they are likely to get damaged moving around your car c. they may be thrown into a spot that disrupts your driving d. they will be more easily retrieved from a single storage location