IXL | Identify proportional relationships from tables: with fractions | 7th grade math

or

Select the tables that show a proportional relationship between

x

and

y

.

x	y
1	5 4
3	15 4
4	5

x	y
7	7 4
8	2
9	9 4

ref_doc_title.

or

Learn with an example

question

Select the tables that show a proportional relationship between

x

and

y

.

x	y
8	6
10	15 2
12	9

x	y
1	3 2
4	6
12	18

key idea

Two variables have a proportional relationship if the ratio of one variable to the other is constant.

solution

To determine whether a table shows a proportional relationship between

x

and

y

,

you can calculate the ratio of

y

to

x

in each row. If these ratios are the same, the relationship is proportional.

See if this table shows a proportional relationship between

x

and

y

.

x	y	Ratio of y to x
8	6	6 8 = 3 4
10	15 2	15 2 10 = 3 4
12	9	9 12 = 3 4

In each row, the ratio of

y

to

x

is

3

4

. So, this table shows a proportional relationship between

x

and

y

.

See if this table shows a proportional relationship between

x

and

y

.

x	y	Ratio of y to x
1	3 2	3 2 1 = 3 2
4	6	6 4 = 3 2
12	18	18 12 = 3 2

In each row, the ratio of

y

to

x

is

3

2

. So, this table shows a proportional relationship between

x

and

y

.

Looking for more? Try these:

Lesson: Proportional relationships

or

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N.7Identify proportional relationships from tables

Lesson: Proportional relationships