unit test 2

Question 1

relation

Answer 1

an association between two quantities. can be described with words, as an equation, as ordered pairs, and as a table of values. or as a graph.

Question 2

how to determine if a relation is linear

Answer 2

straight line on a graph
constant rate of decrease and increase in x and y variables.
when written as an equation, it will contain one or two variables and its degree will be one.
can be written in y=mx+b
variables cannot be in the denominator

Question 3

what does m represent in y=mx+b

Answer 3

slope

Question 4

what does be represent in y=mx+b

Answer 4

the real number which is the y intercept.

Question 5

how to put into y=mx+b form

Answer 5

do the algebra to isolate y.
first, undo addition and subtraction, then multiplication and division.

Question 6

domain

Answer 6

the set of all possible variables for the independent variable ( x)

Question 7

range

Answer 7

the set of all possible values for the dependent variable (y)

Question 8

brackets used in set notation

Answer 8

{}

Question 9

domain bracket ] meaning

Answer 9

means the number is included

Question 10

domain bracket ) meaning

Answer 10

means number is not included.

Question 11

domain and range for discreet data

Answer 11

you just list the points. e.g) {2,3,5,8,}

Question 12

function

Answer 12

two qualities depend on each other in a particular way. each value in domain corresponds to one In range

Question 13

how to tell if function or not

Answer 13

only one y value per x value. does not matter a y has multiple xs.

Question 14

function notation

Answer 14

f(x) = something

Question 15

to write in function notation

Answer 15

isolate y / figure out which unique formula gives you the y value.

Question 16

slope formula

Answer 16

change in y divided by change in x

Question 17

slope of horizontal line

Answer 17

0

Question 18

slope of verticle line

Answer 18

undefined

Question 19

slope of line falling to the right

Answer 19

negative

Question 20

general form

Answer 20

must equal zero. coefficient on x must be positive and coefficient on y and normal number must both not be negative.

Question 21

slope point form

Answer 21

y-y1=m(x-x1).
m is the slope, and x1 and y1 can be any coordinates.

Question 22

parallel lines

Answer 22

same slope, do not interecept.