Do you want to learn how to solve the questions about affine functions (1st degree functions) that are on the ENEM? In this Math video lesson, you will learn how to solve questions about Affine Functions that have already been on the ENEM, in previous exams, and you can download the PDF material to practice in the last link in the description. This content is studied in the 1st year of high school. Don't forget, this subject is a good choice for the ENEM. Study with me and be successful in Math. ONLINE MATHEMATICS PLATFORM: Solved questions from previous ENEM exams 01) (ENEM-2017) In one month, an electronics store starts to make a profit in the first week. The graph represents the profit (L) of this store from the beginning of the month until the 20th. But this behavior extends until the last day, the 30th. The algebraic representation of profit (L) as a function of time (t) is A) L(t) = 20t + 3,000 B) L(t) = 20t + 4,000 C) L(t) = 200t D) L(t) = 200t – 1,000 E) L(t) = 200t + 3,000 02) (ENEM-2017) A linear depreciation system, establishing that after 10 years the monetary value of an asset will be zero, is used in the income tax returns of some countries. The graph illustrates this situation. A person acquired two assets, A and B, paying 1,200 and 900 dollars, respectively. Considering the information given, after 8 years, what will be the difference between the monetary values, in dollars, of these goods? A) 30. B) 60. C) 75. D) 240. E) 300. 03) (ENEM-2016) A 6,000 L cistern was emptied in a period of 3 h. In the first hour, only one pump was used, but in the following two hours, in order to reduce the emptying time, another pump was turned on along with the first. The graph, formed by two line segments, shows the volume of water present in the cistern, as a function of time. What is the flow rate, in liters per hour, of the pump that was turned on at the beginning of the second hour? A) 1,000 B) 1,250 C) 1,500 D) 2,000 E) 2,500 04) (ENEM-2016) One of Brazil’s greatest challenges is the management of its natural resources, especially water resources. There is a growing demand for water and the risk of rationing cannot be ruled out. The water level in a reservoir was monitored for a period, and the result is shown in the graph. Suppose that this linear trend observed in the monitoring continues for the next few months. Under the given conditions, what is the minimum time, after the sixth month, for the reservoir to reach the zero level of its capacity? A) 2 and a half months. B) 3 and a half months. C) 1 and a half months. D) 4 months. E) 1 month. 05) (ENEM-2012) The supply and demand curves for a product represent, respectively, the quantities that sellers and consumers are willing to trade based on the price of the product. In some cases, these curves can be represented by straight lines. Suppose that the quantities of supply and demand for a product are, respectively, represented by the equations: QO = –20 + 4P QD = 46 – 2P where QO is the quantity of supply, QD is the quantity of demand and P is the price of the product. From these supply and demand equations, economists find the market equilibrium price, that is, when QO and QD are equal. For the situation described, what is the value of the equilibrium price? a) 5 b) 11 c) 13 d) 23 e) 33 Here on the channel you will find several free Math video classes for elementary and high school. SUBSCRIBE TO THE CHANNEL HERE: https://www.youtube.com/c/EscoladeNum... Follow us on social media: ► PLATFORM (Website): https://www.escoladenumeros.com.br ► Facebook: / escoladenumeros ► Instagram: / escoladenumeros ► Twitter: / escoladenumeros EMAIL FOR CONTACT: [email protected] CREATED BY MASTER PROFESSOR IN MATHEMATICS THYAGO ARAUJO FERREIRA: ESCOLA DE NÚMEROS is a YouTube channel that presents Math classes (Basic, ENEM, Entrance Exams, Olympics and Contests) completely free of charge and with simple and objective language, so that anyone (children, young people and adults) can enjoy the content. COME BECOME AN EXPERT IN MATHEMATICS! A big hug, good studies and see you in the next video. Link to the exercise list: https://thyagoaraujo.com/listas-de-qu... #Mathematics #Highschool #ENEM