2-4

Question 1

what is the constant of variation in a direct variation

Answer 1

the slope

Question 2

what is a direct variation

Answer 2

y=mx

Question 3

slope intercept form

Answer 3

y=mx+b

Question 4

point slope form

Answer 4

(y-y1) = m(x-x1)

Question 5

formula to find slope

Answer 5

(y1-y2) / (x1-x2)

Question 6

standard form

Answer 6

Ax + By = C

Question 7

what does standard form need to have

Answer 7

positive A, no fractions

Question 8

all direct variations go through the

Answer 8

orgin (0,0)

Question 9

parallel lines have the

Answer 9

same slope, different y intercept

Question 10

perpendicular lines have the

Answer 10

opposite reciprocal slope, different y intercept

Question 11

what is the slope of a line perpendicular to m= 4

Answer 11

-1 / 4

Question 12

y intercept

Answer 12

(0,y)

Question 13

x intercept

Answer 13

(x,0)

Question 14

how to find the x intercept

Answer 14

set y = to zero

Question 15

slope is

Answer 15

rise / run or delta y / delta x

Question 16

delta means

Answer 16

the change in

Question 17

horizontal lines have a slope of

Answer 17

zero

Question 18

vertical lines have a slope of

Answer 18

undefined

Question 19

an equation is a function when there is no repetition in the

Answer 19

domain

Question 20

(x,y) is also

Answer 20

(domain, range) , (input, output)

Question 21

when you write the domain and range you have to use

Answer 21

braces

Question 22

a function is linear when the domain and range change by the same

Answer 22

constant value

Question 23

function notation

Answer 23

f (x) = x + 2

Question 24

f (x) or f of x is also called

Answer 24

y

Question 25

How should you write the domain and range (not in braces)

Answer 25

Domain: the lowest x value ≤ x ≤ highest x value Range: lowest y value ≤ y ≤ highest y value

Question 26

write the domain and range as an inequality of a line who's domain is {-9, 7, 6, 5, 10} and range is {-3, 5, 10, 12}

Answer 26

Domain: -9≤ x ≤ 10 Range: -3≤ y ≤ 12

Question 27

what is a relation

Answer 27

a set of ordered pairs

Question 28

if a line goes on forever on both sides the domain and range would be

Answer 28

all real numbers or (-infinity, infinity)

Question 29

draw graph quadrents

Answer 29

one is top left, two is top right, three is bottom left, four is bottom right

Question 30

always write intercepts as

Answer 30

a point

Question 31

function families are functions that have the same

Answer 31

exponents

Question 32

function families are called families because their - will look similar

Answer 32

graph

Question 33

what is the one function family that will have random graphs

Answer 33

to the power of 4

Question 34

which function family creates lines

Answer 34

exponent of 1