Test Chapter 1 TENTATIVELY scheduled for Wednesday, 9/21. Homework: P. 44-46/19-31 all, 33, 35, 43, 44, 46 Test Chapter 1 TENTATIVELY scheduled for Wednesday, 9/21.

Warm Up Review of 3 types of solution sets P Warm Up Review of 3 types of solution sets P. 39/ 85-90, no calculator Coordinate plane review

CCSS Content Standards A.REI.10 Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line). F.IF.1 Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x). Mathematical Practices 1 Make sense of problems and persevere in solving them. Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

Notes 1.6 Relations Highlight all vocabulary and definitions. Notes for today Highlight all vocabulary and definitions.

Example 2 Independent and Dependent Variables B. The number of calories you burn increases as the number of minutes that you walk increases. Identify the independent and the dependent variables for this function. Answer:

Example 2 Independent and Dependent Variables B. The number of calories you burn increases as the number of minutes that you walk increases. Identify the independent and the dependent variables for this function. Answer: The time is the independent variable. The number of calories burned is the dependent variable, as it is affected by the time.

Example 2 A. In a particular club, as membership dues increase, the number of new members decreases. Identify the independent and dependent variable in this function. A. The number of new members is the independent variable. The dues is the dependent variable. B. Membership dues is the independent variable. The number of new members is the dependent variable. C. x is the independent variable. y is the dependent variable. D. Both variables are independent.

Example 2 B. The area of a square increases as the length of a side increases. Identify the independent and dependent variable in this function. A. The length of the side is independent, and the the area of the square is dependent. B. The area is independent, and the side length is dependent. C. Both variables are independent. D. Both variables are dependent.

Example 3 Analyze Graphs The graph represents the temperature in Ms. Ling’s classroom on a winter school day. Describe what is happening in the graph. Sample answer: The temperature increases after the heat is turned on. Then the temperature fluctuates up and down because of the thermostat. Finally, the temperature drops when the heat is turned off.

Example 3 The graph represents Macy’s speed as she swims laps in a pool. Describe what is happening in the graph. A. Macy is doing bobs. B. Macy’s speed increases as she crosses the length of the pool, but then decreases to zero when she turns around at the end of each lap. C. Macy is swimming at a constant speed. D. Macy’s speed continues to decrease.

Exit Ticket Give an example which includes both an independent and dependent variable. Identify each. Don’t forget: Put your name on your ticket!