warm-up: 1.find the slope that passes through the points (-5, -4) and (1, -2). 2.use the graph to...
Post on 18-Jan-2018
214 Views
Preview:
DESCRIPTION
TRANSCRIPT
Warm-up: 1. Find the slope that passes
through the points (-5, -4) and (1, -2).
2. Use the graph to the right to find the slope that passes through the points.
3. Identify the slope and y-intercept of -4x + 8y = 40
1.7Graph Linear Functions
No School: Monday1.5-1.9 Quiz: 1/22/10Unit 1 Test: 1/27/10
Vocabulary: You have seen linear functions written
in the form y = mx + b. By naming a function f, you can write it using function notation: f(x) = mx + bf(x) means that you have “x” in the equation.
f(x) is just another way to write y =
Vocabulary: A family of functions is a group of
functions with similar characteristics.
The most basic linear function family of all linear functions is called the parent linear function and has the following form: f(x) = x.
Example 1: Graph the function g(x) = x + 1.
Compare the graph with the graph of f(x) = x.
Example 2: Graph the function h(x) = 2x.
Compare the graph with the graph of f(x) = x.
Example 3: Graph the functions. Compare the
graphs. g(x) = x + 2 and h(x) = -x + 2
Example 4: Standardized Test Practice What is the value of the function
f(x) = -2x – 7 when x = -2? a) -11b) -3c) 3d) 11
Your Turn: Evaluate the function for the given
value of x:1. f(x) = 0.3x – 1.2; x=7
2. f(x) = -2/5x + 1/10; x=4
Example 5: For the function f(x) = -3x + 2, find
the value of x so that f(x) = -13
f(x) = -3x + 2 f(x) = -13
f(x) = f(x)-3x + 2 = -13
Your Turn: Find the value of x so that the
function has the given value:1. g(x) = -1/2x – 3; g(x) = 4
2. h(x) = 5x – 3; h(x) = -13
Homework: P. 41-42 #2-40Evens Correct your quiz (on a separate
sheet of paper)
top related