Question

Which relation is a function?

A. {(1, 2); (1, 3); (1, 4); (1, 5)}
B. {(1, 2); (2, 3); (3, 4); (4, 5)}
C. {(1, 2); (2, 3); (3, 4); (2, 5)}
D. {(1, 2); (3, 2); (3, 3); (4, 2)}

B?

Answer 1

@jigglypuff314

Answer 2

Emily.. how much time do you have to stay on?

Answer 3

B is correct :)
and maybe 20 minutes...

Answer 4

Ok, then I'll ask quickly!

Answer 5

What is the range of the relation?

{(1, 2), (2, 4), (3, 2), (4, 4)}

A. {2, 4}
B. {1, 2, 3, 4, 6}
C. {2, 4, 6}
D. {1, 2, 3, 4}

A

Answer 6

correct :)

Answer 7

Ok, next :)

For the function f(x) = 2 – 3x, find f(–4).

A. –5
B. 14
C. 12
D. –10

Answer 8

f(-4) means plug in -4 for x into the function f(x)
so 2 - 3(-4) =

Answer 9

B

Answer 10

yep :)

Answer 11

Write the equation of the function graphed.

A. f(x) = |x| – 4
B. f(x) = |x| + 4
C. f(x) = |x – 4|
D. f(x) = |x + 4|

http://static.k12.com/calms_media/media/242500_243000/242869/1/776b28b2042095efe0c0bbedfe0778ce32d29a11/VHS_ALG_L3_S2_01_16_UTQ4.gif

Answer 12

C?

Answer 13

f(x) = |x - h| + k
when (h, k) is the vertex
D

Answer 14

Oh.. so the answer is D?

Answer 15

yup yup :)

Answer 16

thanks! on to the next one :)

Which is the graph of the function g(x) = |x + 3|?

Answer 17

left 3
so D

Answer 18

umm.. A?

Answer 19

oh.. oops

Answer 20

wait.. which question are you talking about?

Answer 21

g(x) = |x + 3|

Answer 22

@jigglypuff314 its D for the graph?

Answer 23

oh

Answer 24

D for both?

Answer 25

D for this one: Which is the graph of the function g(x) = |x + 3|?

Answer 26

yup

Answer 27

Which equation represents a direct linear variation?

A. y = x2
B. 1/x
C. 2/5x
D. y = x + 3

C?

Answer 28

y = x is linear
D

Answer 29

is y=x+2 linear?

Answer 30

yup :)

Answer 31

then why is it wrong in:

Which equation represents a direct linear variation?

A. y = ½x
B. y = x + 2
C. 1/x
D. y = x^2

A is correct

Answer 32

C. y=1/x*

Answer 33

... ... ...?
idk >,< :,(

Answer 34

its ok. :)

Which is the direct linear variation equation for the relationship?

y varies directly with x and y = 12 when x = 4.

A. y = x + 8
B. y = 2x + 4
C. y = x – 8
D. y = 3x
D?

Answer 35

yeah, I think so :)

Answer 36

Emily.. you sure all the others are correct?

Answer 37

I'm human, so ... 89% sure XD

Answer 38

Which relationship shows a quadratic variation?

Answer 39

uhhhhh...
between B or C
most likely B 1, 4, 9, 16 pattern of quadratic...

Answer 40

ok, you sure? =)

Answer 41

C...

Answer 42

yeah C...
1, 4, 9, 16...

Answer 43

Which is the quadratic variation equation for the relationship?

y varies directly with x2 and y = 27 when x = 6.

A. y = x^2 + 25
B. y = 12x
C. y = 4x^2
D. y = 2x^2

Answer 44

So C, or B?

Answer 45

C for the other one...
idk this one...

Answer 46

you don't know this one at all..?

Answer 47

maybe like y = kx^2 ?
but me not good with "direct variation" problems... sorry :/

Answer 48

then C?

Answer 49

idk probably?

Answer 50

ok :)

Which relationship shows an inverse variation?

Answer 51

as x increases, y decreases... B

Answer 52

huh? I think they are all supposed to equal the same

Answer 53

inverse variation is when x increases y decreases...

Answer 54

its the first one...

Answer 55

decreases evenly...?

Answer 56

which one is inverse here?

Answer 57

C

Answer 58

nope, its D

Answer 59

says so here

Answer 60

meh >,<
me not good at variations...

Answer 61

ok, so that one is A

Answer 62

suppose so :P
you probably shouldn't ask me these questions any more XD

Answer 63

y varies inversely with x and y = 8 when x = 2.

Which is the inverse variation equation for the relationship?


A. y = x + 2
B. y = 2x
C. 16/2
D. y = 16x

Answer 64

C?

Answer 65

oh.. C is actually 16/x

Answer 66

y = k/x
yeah yeah C

Answer 67

ok, last one!

Write a coordinate rule for the translation of f(x) to g(x).

A. (x, y) → (x + 5, y – 4)
B. (x, y) → (x + 4, y – 5)
C.(x, y) → (x – 4, y + 5)
D. (x, y) → (x – 5, y + 4)

Answer 68

C..?

Answer 69

left 5 = (x-5,...)

Answer 70

oh, D?

Answer 71

I think so. :)

Answer 72

ok! thanks :)

Answer 73

you're better then me at this stuff at this point XD

Answer 74

Lol, no, not really :P

Answer 75

at this stuff yes :P

Answer 76

I'll be going now, thanks for your help! :)

Answer 77

see ya later! :)