Question

http://prntscr.com/nl3kaa

Answer 1

@Vocaloid @Narad

Answer 2

?

Answer 3

@Hero

Answer 4

Question 1
A direct proportion doent have reciprocal, squares or square roots

Answer 5

Question 2
y=a/x
with the values given y=5 and x =-1, you can calculate a, then obtain the equation

Answer 6

Question 1 is not correct

Answer 7

Question 2 is not correct

Answer 8

Question 3 in not correct

Answer 9

so question 1 b?

Answer 10

yes, this is correct

Answer 11

for number 2 a=-5

Answer 12

so A?

Answer 13

Yes

Answer 14

and 3 is D?

Answer 15

Yes

Answer 16

http://prntscr.com/nl3tan

Answer 17

No

Answer 18

isnt it 6*3?
or 6/3?

Answer 19

The same as you did before in 2 and 3

Answer 20

D?

Answer 21

yes

Answer 22

http://prntscr.com/nl3uun

Answer 23

A direct variation is a straight line

Answer 24

So its inverse

Answer 25

yes

Answer 26

http://prntscr.com/nl3wqs
ignore my answers^

Answer 27

A direct proportion is y=ax
Sustitute the values to find a

Answer 28

so y=a/-3 ?

Answer 29

Sustutute the values y=15 and x =-3, to find a

Answer 30

15=a/-3

Answer 31

y=ax
a=y/x

Answer 32

a=-45

Answer 33

no you are multiplying

Answer 34

Can you make this clear please because im plugging in the numbers and I get -45

Answer 35

y=ax
a=y/x=15/(-3)

Answer 36

Now im getting -5

where do I put the 6 in this

Answer 37

y=-5x
Now, plug in x=6

Answer 38

-30

Answer 39

yes

Answer 40

so for the next question a=6/-1 is -6
y=-6x
x=5
is -30

Answer 41

so B?

Answer 42

yes

Answer 43

okay

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Answer 44

y=1/x
y=1/x-4
-4 moves down

Answer 45

so A

Answer 46

since down

Answer 47

yes

Answer 48

http://prntscr.com/nl4aea

Answer 49

The parent function is
g(x)=1/x
and
f(x)=1/(x-6)+7
There are 2 transformations
The +7 will translate up by 7 units and
the -6 will translate 6 units to the right

Answer 50

okay

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Answer 51

The parent function is
g(x)=1/x
f(x)=a/(x+h)+k
a is a vertical stretch
h is a horizontal shift (a>0, to the left), and (a<0, to the right)
k is a vertical shift, k>0 to the top and k<0 down

Answer 52

Got it

http://prntscr.com/nl4fx0

Answer 53

It's the same the last question except that a=1

Answer 54

but this is range

Answer 55

f(x) < -4 ?

Answer 56

The domain is
\[\mathbb{R} -(-1)\]
y=3/(x+1)-4
y+4=1/(x+1)
x+1=1/(y+4)
x=1/(y+4)-1
So the range is
\[\mathbb{R}-(-4)\]

Answer 57

Ohh okay

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Answer 58

Let
\[y=2/(x-3)-5\]
Can you find x in terms of y?

Answer 59

how can I do that

Answer 60

-5?

Answer 61

yes
\[y \neq -5\]

Answer 62

okay

http://prntscr.com/nl4q5s

Answer 63

I think it's a litle smaller than -0.5

Answer 64

0.75?

Answer 65

or negative

Answer 66

-0.75

Answer 67

okay

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Answer 68

Your answer is correct, if you plug in the value of n=1/2, you'll see that RHS is not equal to LHS

Answer 69

okay

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Answer 70

The same as before
y=a/x

Answer 71

2=a/9

a=18

Answer 72

yes

Answer 73

but dont I have to write an equation?

Answer 74

yes
y=a/x

Answer 75

http://prntscr.com/nl4x0a

5=a/3

a=15

Answer 76

and
y=15/x

Answer 77

got it

http://prntscr.com/nl4xxa

Answer 78

direct?

Answer 79

yes

Answer 80

http://prntscr.com/nl4y4x

Answer 81

The same as before
y=ax

Answer 82

15=a/-3

Answer 83

-45

Answer 84

no

Answer 85

then what is it?

Answer 86

this is timed please

Answer 87

y=-5x=-5*4=-20

Answer 88

so -20 is the answer?

Answer 89

yes

Answer 90

http://prntscr.com/nl53ke

Answer 91

What would you say?

Answer 92

im not sure tbh

Answer 93

at x=1, what's the value of y?

Answer 94

-1?

Answer 95

> -1

Answer 96

oh so thats the answer?

Answer 97

no, it's between 0 and -1

Answer 98

how do I know which one

Answer 99

you see where is x=1
you go vertically down until you meet the red curve

Answer 100

isnt it -4 then?

Answer 101

Yes

Answer 102

okay

Answer 103

http://prntscr.com/nl59lr

Answer 104

The same as the last question

Answer 105

-3?

Answer 106

-0.3

Answer 107

oh okay

http://prntscr.com/nl5ao6

Answer 108

The same as before

Answer 109

how do I do the transformations again?

Answer 110

\[f(x)=a/(x+h)+k\]
a=stretch vertically
h=horizontal shift, a>0 to the left, a<0 to the right
k=vertical shift, a>0 to the top, a<0 down

Answer 111

h>0 to the left, h<0 to the right
k>0 to the top, k<0 down

Answer 112

can you plug in the numbers please

Answer 113

Stretch vertically 5 times
+1 is a horizontal shift to the left
-7 is vertical shift of 7 units down

Answer 114

okay

http://prntscr.com/nl5b2l

Answer 115

Graph moves 10 units down

Answer 116

Graph moves 5 units up

Answer 117

http://prntscr.com/nl5fus

Answer 118

\[y=-6/x\]
y=-6/-1=6

Answer 119

http://prntscr.com/nl5hol

Answer 120

Already done, this is false

Answer 121

http://prntscr.com/nl5iaw

Answer 122

already done

Answer 123

but the numbers arent plugged in?

Answer 124

Stretch vertically by a factor of 3
Horizontal shift to the left by 2 units
Vertical shift up by 4 units

Answer 125

okay thank you

Answer 126

ok