[Solved] When plotted on a graph, cost functions are usually displayed by having the level of activity (machine hours, etc.)plotted on the horizontal axis (called the x-axis )and the amount of total costs corresponding to (or dependent on)the levels of that activity on the vertical axis (called the y-axis). Fetishism: A sexual fixation on a nonliving object or non-genital body part, which is a central source of erotic satisfaction. Fetishists: Individuals who experience sexual arousal and gratification from a specific object, body part, or scenario not traditionally considered sexual in nature. Frotteur: is an individual who derives sexual pleasure from rubbing against non-consenting people, often in crowded public places. Pedophilia: A psychiatric disorder characterized by an adult having sexual fantasies, urges, or behaviors towards prepubescent children.