Teacher  Carol Barnes 

Subject Area  Algebra 
Grade Level  7th/8th 
Week #  Q1W8 Oct. 48 
Unit of Instruction  Unit 3 Introduction to Functions 
Standard(s) Taught 

MAFS. 912.FIF.2.4 For a function that models a relationship between two quantities, interpret key features of graphs and tables in terms of the quantities, and sketch graphs showing key features given a verbal description of the relationship. Key features include: intercepts; intervals where the function is increasing, decreasing, positive, or negative; relative maximums and minimums; symmetries; end behavior; and periodicity. MAFS.912.AREI.4.10 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). MAFS.912.FIF.1.1 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). MAFS.912.FBF.2.3 Identify the effect on the graph of replacing f(x) by f(x) + k, kf(x), f(kx), and f(x + k) for specific values of k (both positive and negative); find the value of k given the graphs. Experiment with cases and illustrate an explanation of the effects on the graph using technology. Include recognizing even and odd functions from their graphs and algebraic expressions for them.

Learning Targets and Learning Criteria 

Classroom Activities 
Monday/Tuesday: Bellringer: Find the value of the function f(x) = 4x2 for x = 3.5 AND graph f(x)=x squared, then graph g(x)=x squared + 2. Notice the shift in the new parabola that is graphed for g(x) is 2 above the graph for f(x). Adding two to the equation for f(x) cause the graph to shift two above the original graph. Whole Group: ISN page 12 Domain and Range of Functions expressed with inequalities or equations. Domain and Range Notes for Functions. Do problems 1 – 6 with class. Small Group: Students do problems 714 with a shoulder partner. Check answers to key then insert as page 15 into ISN. Independent: HW page #1 Domain and Range HW 1 Key for Domain and Range Notes Domain and Range Notes Key Wednesday: Bell Ringer: Substitute x = 4 into f(x) = x squared 5x +2; Find the maximum & minimum on the graph on the board. Whole group: Answer questions on homework (domain & range). Find the absolute maximum and minimum of the function f(x) on the board. Find the relative maximums and minimums on the graph on the board. (Refer to Khan Academy Videos under Algebra, then functions – maximum and minimum points). Find the “zeros” or xintercepts on the graphs projected on the board. On coordinate plane graph on whiteboard, observe a vertical shift in the graph of a function f(x) = x squared. Small group: With a partner, find the vertical or horizontal shift in the graphs projected on the board. Independent: Khan AcademyAbsolute Maxima and Minima, and Relative Maxima and Minima Thursday/Friday: Bellringer: On paper provided with a parent graph of f(x) = x squared, graph the shift of g(x) = f(x)3. A student will draw the graph on the board. Whole Group: ISN – Page 16 Take notes to explain that a function [we’ll call it h(x)] with a horizontal shift (left or right) is shown like this: h(x) = f(x – horizontal shift), so if a graph is to show a negative shift of 4 to the left (4), in the format above it looks like this: h(x) = f(x – – 4) Notice the double negative in front of the four. The double negative makes the four positive, so it ends up looking like this h(x) = f(x + 4), and represents a shift of the graph horizontally to the left 4 units. I you want the graph to shift to the right 3 units, it looks like this: h(x) = f(x – 3). These shifts will be drawn on the board and copied with colored pencil onto the paper provided for the bell ringer above. Small Group: ISN page 17 is a half page insert of a graph of a function. Partners will find domain, range, xintercept, yintercept, maximum, minimum, increase, and decrease on the graph. Independent: Khan Academy – Positive and Negative Intervals, and Increasing and Decreasing Intervals. 
Assignments Due 
Domain and Range HW 1 page (printed page) Khan Academy: Absolute Maxima and Minima, Relative Maxima and Minima, Positive and Negative Intervals, and Increasing and Decreasing Intervals. Functions Real World Graphs HW 2 11 problems (printed page) IXL Q.16 to 80% 
Additional Resources 
All IEP and ESOL accommodations will be provided daily. Khan Academy videos – type any topic in search bar followed by Khan Academy to find an instructional video for additional support. https://www.khanacademy.org/ IXL – Provides support for any grade level math standard. Edgenuity – https://www.edgenuity.com/ 