A function is continuous at a point x = a if and only if: 1. exists 2. exists 3. (i.e., the limit equals the function value) Increasing/Decreasing Intervals of a Function Remember: f ()x determines whether a function is increasing or decreasing, so always use the Approximate the intervals where each function is increasing and decreasing. 5) x y 6) x y Use a graphing calculator to approximate the intervals where each function is increasing and decreasing. 7) y x x 8) y x Approximate the intervals where each function is increasing and decreasing. 5) x y 6) x y Use a graphing calculator to approximate the intervals where each function is increasing and decreasing. 7) y x x 8) y x

Increase, Decrease, Concavity. In 1961, after purchasing hundreds of packs of baseball cards all summer, Louisa finally unwrapped the lucky pack that contained a card for her favorite player, Orlando Cepeda. The lucky pack cost her 5 cents. This is a fact sheet intended for health professionals. For a reader-friendly overview of Magnesium, see our consumer fact sheet on Magnesium.. Introduction. Magnesium, an abundant mineral in the body, is naturally present in many foods, added to other food products, available as a dietary supplement, and present in some medicines (such as antacids and laxatives).