The Human Immune System Why do you get sick? How do you get better? A disease is any that affects normal of the body. Some diseases are , or are inherited, others are caused by materials in the , but most are caused by such as bacteria, viruses, and fungi. Pathogens are “sickness-makers.” With pathogens all around us, the system works like a protection system. Some of these defenses are simple keeping all invaders out, while others work like a security guard, trained to spot and pathogens who have slipped past the barrier.

The equation shown below represents function f. f(x)= -2x+5 the graph shown below represents function g. which of the following statements is true? a. over the interval [2, 4], the average rate of change of f is the same as the average rate of change of g. the y-intercept of function f is less than the y-intercept of function g. b. over the interval [2, 4], the average rate of change of f is greater than the average rate of change of g. the y-intercept of function f is greater than the y-intercept of function g. c. over the interval [2, 4], the average rate of change of f is the same as the average rate of change of g. the y-intercept of function f is greater than the y-intercept of function g. d. over the interval [2, 4], the average rate of change of f is less than the average rate of change of g. the y-intercept of function f is the same as the y-intercept of function g.