When do you use point-slope form

when you have the slope and one set of points .................y-y1=m(x-x1)

what is a range

all y coordinates

what is a domain

all x coordinates

what does a 0 in the denominator mean

undefined

what is standard form?

Ax+By=C

what formula do I use when I need to determine if lines are parallel or perdendictular

slope intercept ...y=mx+b

what is the formula to determine the slope

m=y2-y1 / x2-x1

what is slope formula

m=y2-y1 /x2-x1

What is the formula to determine rate of change

slope formula m=y2-y1 / x2-x1

what is slope intercept formula

y=mx+b

in slope intercept what is the b?

the y intercept

what is the formula for point slope form

Y-Y1=M(X-X1)

what formula do you use when you have the slope and one set of points

point slope formula ...y-y1=m(x-x1)

when can you use slope intercept form

when you have points that include zero (0,#)

when a line is horizontal is has what slope

zero slope

when a line is vertical is has what slope

undefined (zero in denominator)

when do you use slope form

when you have 2 sets of points ....m=y2-y1 / x2-x1

all linear equations are functions except for those of the form what, which are vertical lines

x=c

what kind of line is x=2

vertical

function is another name for what

y

How do you use the vertical line test to determine if something is a function

if a vertical line can be drawn so that it intersects a graph more than once, the graph is not a function

what is a function

set of ordered pairs that assigns to each x value exactly one y value

is this a function? (-1,0),(-1,6),(-1,8)

no, because negative 1 is paired with 3 different y's

what formula do you use if you have the slope and one point

point slope form y-y1=m(x-x1)

what formula do you use if you only have 2 sets of points

use two formulas: m=y2y1 / x2-x1 to find slope then use.... y-y1=m(x-x1) and plug in one point and slope

when do you use point slope form

when you have a point and slope and your set of points doesn't have a zero in it. If it has a zero, use slope intercept form

how do you know if a line is perpendicular

if the product of a slope is -1

slope =

rise/run

what formula do you use when you have one point and the slope

point-slope form

standard form can't have what

a negative variable

what kind of line is y=3

horizontal

what kind of line is x=3

vertical

how do you change slope intercept to standard form in y=3x+2

move the x and y to the same side. = 3x-y=2

what formula is the same as counting the rise over the run

slope formula m=y2-y1 / x2-x1

when finding x intercepts...

let y =0 (cover up y)

when finding y intercepts...

let x -0 (cover up x)

when finding intercepts which one do you cover up?

the one that is 0

a vertical line has...

no y intercept

a horizonal line has...

no x intercept

y=3 is what kind of line

horizontal

when you are plotting intercept don't forget...

that intercepts need two #'s

what variable is always first in standard notation

x

what is an intercept

where x and y cross each other

what is a linear equation in two variables

one that can be written in the form as Ax+By=C

the graph of a linear equation in two variables is what

a straight line

the graph of m=yx+b crosses the y-axis at what

(0,b)

rise equals what

change in y

run equals what

change in x

parallel lines have the same what and different what

same slope, different y-intercepts

f(x) does not mean what

f times x

when subtracting negatives

if the signs are the same, you add and keep the sign

standard form means what

solve for y

how do you find slope if you don't have any points

use slope intersept form y=mx+b, the coefficent of x is the slope

How do you find the domain

the denominator needs to equal 0, input what will make the answer 0

how to you write interval notation to exclude a specific #.

(negative infinity, the specific #) u(the specific #, infinity)