Aspeed-time graph shows that a car moves at 20 m/s for 15 s. the car's speed then steadily decreases until it comes to a stop at 40 s. which of the following describes the slope of the speed-time graph from 15 s to 40 s?

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.