Domain
Range
Endpoints
Today's Preview
100
Identify the domain. 
{x | -2 ≤ x ≤ 2}
100
Identify the range. 
{y|0 <= y <= 4}
100
How do we represent a line continuing infinitely?
An arrow!
100
What is the amount of money you start with before interest is added.
What is the principal?
200
Identify the domain. 
{x | -4 < x ≤ infty}
200
Identify the range. 
{y|1 <= y <=infty}
200
How do we represent a line STOPPING and NOT including the final point?
An open circle!
200
What is the percent that tells how much interest is earned or paid?
What is the interest rate?
300
Identify the domain. 
{x|-infty <= x <=infty}
300
Identify the range
{y|-5 <= y <=infty}
300
How do we represent a line STOPPING and INCLUDING the final point?
Closed circle!
300
What is the amount of time the money is borrowed or invested.
What is time?
400
Identify the domain.
{x|-infty <x<infty}
400
Identify the range. 
{y|-infty < y < infty}
400
What are the two endpoints representing?
Open Circle -> Stops without including the final point.
Arrow -> Continues forever.
400
What is the formula used to calculate simple interest.
What is I = P × R × T?
500
This type of interest is only calculated on the original principal, not on past interest.
What is simple interest?