Unit 1 Math Models Notes
independent variable
this will be the domain on a discrete/continuous graph
dependent variable
this will be the range on a discrete/continuous graph
closed circle
< or > (will have the line underneath)
open circle
< or > (no line underneath)
Substitution
An algebraic model that can be used to find the exact solution of a system of equations
Continuous
Line on graph will be curved or shade like a 'v', or another non linear shape
< less than
Shade to the left
> greater than
Shade to the right
set notation
When you have a set of numbers and you put them in "{ }" examples: D: {#,#,#} R: {#,#,#}
interval notation
an expression that uses inequalities to describe subsets of real numbers examples: (#, infinity) [#, infinity) (infinity, #) (infinity, #]
*calculator reminder*
click ZOOM then 9 to reveal a scatter plot after putting data in the L1, L2 table
Discrete
line on graph will be linear or or there use not curved
function
no numbers in the domain will repeat
closed circle on a graph
put number in a bracket, infinity in parentheses
open circle on a graph
put number in parentheses, infinity in parentheses
Linear
simple line on graph
*substitution reminder*
when (#)#^ happens, make sure you multiply the exponent and the number first, THEN add the number before (as shown in parentheses)
Quadratic
will be curved, a parabola, or uneven
infinity
will have parentheses when put in interval notation