Functions
How do you know if it is a function?
every x value has only one 1 value
find f (-5) means
find y when x = -5
up or down
What test can you do to see if it is a function?
vertical line test
find all values of x when f (x) = 2 means
find x when y = 2
the number before the x makes the line steeper if bigger than
1
A graph is a function if a vertical line is drawn and can pass through only ______ or _______ points
one or none
How do you find minimum and maximum of f (x)
find the highest and lowest value of y
less steep means
less than 1
f (x) + 3 means
move f (x) up 3
The domain of f(x) is how far
left to right the graph goes
If the number before the x is negative the line will
decrease
f (x- 3) means move f (x)
right 3
The range of f (x) is how far
up or down the graph goes
y = -2x + 1 means
parent function will move 1 unit up, make it steeper and will be decreasing