21 terms

Function

no two ordered pairs have the same x value, they can have same y

Relation

any relationship between two variables

Not a function if

If a vertical line can cross in more than one place

Domain order

left to right

Range order

bottom to top

Only list

the lowest and highest values

Closed bracket

included points, greater / less than or equal to

In standard form...

A has to be positive, all have to be integers (not fractions)

slope formula

(y₂- y₁) / (x₂- x₁)

It is linear if

you can put a dot on the axis and make a line

Not linear if..

x has an exponent

variable is in denominator

It has a product of x times y or x and y

variable is in denominator

It has a product of x times y or x and y

For every 2 points..

there is one line

How to plot x / y int

plug in 0 for the other one

All horizontal lines have

a slope of 0

All vertical lines have

an undefined slope

Rate of change

a comparison of a change in one quantity with a change in another quantity

Two lines are parallel only if their slopes are

equal

Two lines are only perpendicular if their slopes are

opposite reciprocals

Special function

function defined by two or more expressions,

2 strategies for graphing linear functions

1. get into slope intercept form

2. get in standard form and graph using intercepts

2. get in standard form and graph using intercepts

When graphing linear equalities don't forget to

Test a point, and if it works, shade that region