If an x value has more than one y-value associate with it -- for example, in the relation {(4, 1), (4,2)}, the x-value of 4 has a y-value of 1 and 2, so this set of ordered pairs is not a function. If each x-value corresponds with only one y-value, then the relation is a function.
ACTIVITY 2. READ AND LEARN LESSON FUNCTIONS OF COMMUNICATION Communication plays an important role in your life. It serves many functions in order to help you share thoughts and ideas with individuals and with groups of people. Basically, the functions of communication are as follows: control, social interaction, motivation, emotional expression, and information dissemination. 1. Every communication situation bears any of the following functions discussed below. Communication functions as a form of CONTROL. Communication helps regulate actions and behavior. A traffic enforcer calling your attention whenever you, as a pedestrian or a driver, violate traffic rules, is an example of this function. This function may likely happen whenever your parents at home or your teachers at school impose rules and regulations to follow and abide to. If you happen to violate these rules and regulations, a corresponding punishment may be given to you in order to establish the value of discipline on your part. 2. Communication functions to allow SOCIAL INTERACTION. Communication is meant for sharing and conveying messages, expressions and information. There is no better way to share your thoughts and ideas but through social interaction. This function is always present whenever you talk with your family members at home; whenever you excitedly gush about your common interests with friends; whenever you discuss about lessons with your teachers and classmates at school; and whenever you find yourself in small conversations with acquaintances or even strangers.
1. Calculate the percent by mass BaCI2 if 10.4 barium chloride dissolved in 80.7 g of water2. Calculate the molality of 28 g of CACI2 in 628 g of aqueous solution3. Calculate the molarity of a 20% sulfuric acid solution with a specific gravity of 1.964. A gas that occupies a volume of 2.5 L at a pressure 4.1 kPa is compressed to a pressure of 53kPa. What is the new volume.5. Calculate the density of carbon dioxide at STP.6. For the reaction N2 (g) + 3 H2 (g) --> 2NH3(g). How many liters of H2 reacts with 7.25 L of N2 at STP