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rodikova [14]
3 years ago
5

Sorry about the bad quality :(

Mathematics
2 answers:
dmitriy555 [2]3 years ago
4 0

Answer:

Yes, y varies directly with x, and the equation is y=1.6x.

Step-by-step explanation:

To check where there is a direct relationship between x and y, we need to check whether all the x,y pairs we have fit some rule:

y=k\times x.

For the first pair (x=4, y=6.4),

6.4=k\times 4

Therefore k = 1.6.

For the second pair (x=7, y=11.2),

11.2=k\times 7

Therefore k = 1.6.

For the third pair (x=10, y=16),

16=k\times 10

Therefore k = 1.6.

For the second pair (x=13, y=20.8),

20.8=k\times 13

Therefore k = 1.6.

So x does directly vary with y, and we have found out that k=1.6.

Sholpan [36]3 years ago
4 0

Answer:   \bold{\dfrac{y}{x}=1.6\quad \text{which is also equivalent to}\quad y=1.6x}

<u>Step-by-step explanation:</u>

\begin {array}{c|c||l}x&y&\dfrac{y}{x}=k\\--&--&-----\\4&6.4&\dfrac{6.4}{4}=1.6\\\\11.2&7&\dfrac{11.2}{7}=1.6\\\\10&16&\dfrac{16}{10}=1.6\\\\13&20.8&\dfrac{20.8}{13}=1.6\\\end{array}\\

Since the k-value is the same for every value in the table, we can conclude that y varies directly with x and the constant of variation k = 1.6  

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Answer:

The parent function is the simplest form of the type of function given.

g

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Horizontal Shift: None

The vertical shift depends on the value of  

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h

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x

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=

f

(

x

)

+

k

- The graph is shifted up  

k

units.

h

(

x

)

=

f

(

x

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−

k

- The graph is shifted down  

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units.

In this case,  

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The graph is reflected about the x-axis when  

h

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x

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Reflection about the x-axis: Reflected

The graph is reflected about the y-axis when  

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x

)

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f

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−

x

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Reflection about the y-axis: None

Compressing and stretching depends on the value of  

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When  

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is greater than  

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When  

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and  

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Vertical Compression or Stretch: Stretched

Compare and list the transformations.

Parent Function:  

g

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x

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Horizontal Shift: None

Vertical Shift: None

Reflection about the x-axis: Reflected

Reflection about the y-axis: None

Vertical Compression or Stretch: Stretched

image of graph

The parent function is the simplest form of the type of function given.

g

(

x

)

=

x

2

The transformation being described is from  

g

(

x

)

=

x

2

to  

h

(

x

)

=

−

3

x

2

.

g

(

x

)

=

x

2

→

h

(

x

)

=

−

3

x

2

The horizontal shift depends on the value of  

h

. The horizontal shift is described as:

h

(

x

)

=

f

(

x

+

h

)

- The graph is shifted to the left  

h

units.

h

(

x

)

=

f

(

x

−

h

)

- The graph is shifted to the right  

h

units.

In this case,  

h

=

0

which means that the graph is not shifted to the left or right.

Horizontal Shift: None

The vertical shift depends on the value of  

k

. The vertical shift is described as:

h

(

x

)

=

f

(

x

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+

k

- The graph is shifted up  

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h

(

x

)

=

f

(

x

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−

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- The graph is shifted down  

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units.

In this case,  

k

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0

which means that the graph is not shifted up or down.

Vertical Shift: None

The graph is reflected about the x-axis when  

h

(

x

)

=

−

f

(

x

)

.

Reflection about the x-axis: Reflected

The graph is reflected about the y-axis when  

h

(

x

)

=

f

(

−

x

)

.

Reflection about the y-axis: None

Compressing and stretching depends on the value of  

a

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When  

a

is greater than  

1

: Vertically stretched

When  

a

is between  

0

and  

1

: Vertically compressed

Vertical Compression or Stretch: Stretched

Compare and list the transformations.

Parent Function:  

g

(

x

)

=

x

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Horizontal Shift: None

Vertical Shift: None

Reflection about the x-axis: Reflected

Reflection about the y-axis: None

Vertical Compression or Stretch: Stretched

image of graph

Step-by-step explanation:

8 0
3 years ago
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Natali [406]
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Shtirlitz [24]

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