Question

{(-5, -15), (-3, -9), (0, 0) , (2, 6) , (4, 12)}


Identify the rule for the function.
The range is equal to four more than the domain.

The range is equal to eight less than the domain.

The range is equal to three more than the domain.

The range is equal to three times the domain.

Answer 1

Could i find someone ive asked questions on multiple accounts and not once an answer :/

Answer 2

hint: the equation is of the form y = k*x

Answer 3

where k is some fixed number

Answer 4

Also remember that

domain = set of possible inputs (ie x values)
range = set of possible outputs (ie y values)

Answer 5

im still lost

Answer 6

pick any ordered pair you want that's not (0,0)

Answer 7

-5,15

Answer 8

so x = -5, y = 15

Answer 9

plug those values into y = k*x

then solve for k

Answer 10

sry, y = -15

Answer 11

\(\begin{array}{rrrllll}
x&y\\
\hline\\
-5& -15\implies -5\times 3\\
-3& -9\implies -3\times 3\\
0& 0\implies 0\times 3\\
2& 6\implies 2\times 3\\
4& 12\implies 4\times 3
\end{array}\)

Answer 12

and x is -5 right?

Answer 13

yes

Answer 14

giving you like what -60?

Answer 15

y = k*x

y = k*(-5) ... plug in x = -5

-15 = k*(-5) ... plug in y = -15


now solve for k

Answer 16

i feel really mental but im still lost .-.

Answer 17

k*(-5) means "k times -5"

so how do you undo multiplication?

Answer 18

division? :p

Answer 19

so you divide both sides by -5 to isolate k

Answer 20

1 sec grabbing note book 2 work this out

Answer 21

meh

Answer 22

-15 divided by -5 = ???

Answer 23

-3 :p

Answer 24

close, but no

Answer 25

regular 3?

Answer 26

positive 3, yes

Answer 27

so k = 3

Answer 28

y = k*x

turns into

y = 3*x

Answer 29

so I'm sure you see the rule now

Answer 30

either C or D but looks like more like C

Answer 31

why C?

Answer 32

wait looks more like D since its 3 times right?

Answer 33

yep, D is correct

Answer 34

xDDDDDDD

Answer 35

haha ty bet help eva btr than my teachers medals and best responses for yu!!!!!