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3 years ago

The cost of 3 slices of pizza is $4.89. What is the cost of each slice of pizza? $1.63 $1.89 $2.45 $2.88

Mathematics

2 answers:

allsm [11]3 years ago

5 0

1.63 just divided the total by 3

castortr0y [4]3 years ago

3 0

1.63

4.89 divided by 3 = 1.63

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Answer:

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Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Verify each case

Table A

For x=1, y=3

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$k=y/x$ -----> $k=3/1=3$

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$k=y/x$ -----> $k=9/2=4.5$

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Table B

For x=1, y=-5

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$k=y/x$ -----> $k=-5/1=-5$

For x=2, y=5

Find the value of k

$k=y/x$ -----> $k=5/2=2.5$

the values of k are different

therefore

The table B not represent a direct variation

Table C

For x=1, y=-18

Find the value of k

$k=y/x$ -----> $k=-18/1=-18$

For x=2, y=-9

Find the value of k

$k=y/x$ -----> $k=-9/2=-4.5$

the values of k are different

therefore

The table A not represent a direct variation

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For x=1, y=4

Find the value of k

$k=y/x$ -----> $k=4/1=4$

For x=2, y=8

Find the value of k

$k=y/x$ -----> $k=8/2=4$

For x=3, y=12

Find the value of k

$k=y/x$ -----> $k=12/3=4$

All the values of k are equal

therefore

The table D represent a direct variation or proportional relationship

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