Functions
Exponential Functions
Intro to Quadratics
Quadratics
Huh???
100
What does the have a number inside the absolute value signs do to the graphs?
For ex.
y=|x-4|
Moves it left or right.
100
Does 1.04 mean that the percent is increasing or decreasing?
Increasing
100
What does FOIL stand for?
First Outer Inner Last
100
What makes a quadratic equation quadratic
It has to have a variable squared
100
What is Helterbran's favorite color?
Yellow
200
What is the major rule with functions?
One in put can only go to one output
Only one x can go to one y.
200
What is the difference between exponential and quadratic?
Exponential is a number to the power of x (x changes) and quadratic is always to the power of 2
Exponential changes as a faster rate than quadratic
200
What does each form help us find when graphing?
Standard Form
Factored Form
Vertex Form
Standard: The y-intercept
Factored: The x-intercepts
Vertex: Vertex
200
What is the "a" in this expression:
5+4x-3x^2
-3
200
What's 2 + 2
4
300
What does these lines stand for?
y=|x|
The absolute value
300
When looking at the equation y=2^x what does the two mean?
Doubling
Multiplying by two over and over again
300
What is the standard form?
y=ax^2+bx+c
300
Why can't we put x^2+16 into factored form?
No two numbers multiply to a positive and add up to 0.
300
How long do we elect a president for?
4 years
400
What do we need to do with inverse functions?
Solve for the other variable
400
A new library has a collection of 100 books. It expects to triple the number of books each year for the next few years.
Write an equation representing that relationship, where x is time in years since the library is opened, and y is the number of books available.
y=100*3^x
400
What are the x - intercepts of this expression
(x+5)(x-2)
-5 and 2
400
What is the quadratic formula?
x=(-b+-sqrt(b^2-4ac))/(2a)
400
What's the only food that can never go bad?
Honey
500
Find the inverse of
y=2x+4 (get x by itself)
(y-4)/2=x
500
The function c(x)=72*(1.04)^x models the cost in dollars, c, of 1 ounce of a certain chemical used in a laboratory. x represents the number of years since 2010.
How much does an ounce of the chemical cost in 2018? Show your work.
98.54
500
Put (2x+3)(x-8) into standard form
2x^2-5x-24
500
Sing the quadratic formula song
:)