Chapter 1 Linear Functions Section 1.2 Linear Functions and Applications.
2.2 Linear Functions and Function Notation Objective: Identify, evaluate, and graph linear...
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Transcript of 2.2 Linear Functions and Function Notation Objective: Identify, evaluate, and graph linear...
2.2 Linear Functions and Function
NotationObjective: Identify, evaluate, and graph linear
functions
Linear FunctionA linear function is a function of the form y =
mx+b where m and b are constants, such as y = 2x+1
The graph of a linear function is a line.
Linear Function
In order to be a linear function: x cannot have an exponent greater than 1x cannot appear in the denominator
Function NotationBy naming a function “f” you can write it using
function notation
f(x) = mx+b
Read as “the value of f at x” or “f of x”
Note: a function does not have to be named by the letter f. You can also use other letters such as g or h.
Identify a Linear FunctionTell whether the function is linear. If not explain why.
1. f(x) = 2x – 9
2. f(x) = -3x
3. g(x) =
4. h(x) = 5
5. f(x) = x2+2x+1
Identify a Linear FunctionTell whether the function is linear. If not explain why.
a) f(x) = 4x – 3
b)
c)
Evaluate a FunctionEvaluate the function when x = -2
a. f(x) = -3x+7
b. g(x) = x2 + 2x – 10
Graphing Linear FunctionsGraph the function f(x) = 2x – 1
Graph h(x) = 4x – 1
Graphp(t) = -t – 2
Graphb(x) = -2x + 5
Real-world situationYou are joining a fitness club that charges a one-time membership fee of $25 and a monthly fee of $50.
a) Write a function that models your total membership cost.
b) Graph your function from part (a)
c) Use your function model to find the cost of membership for the first year.