IXL | Write an equation from a graph using a table

Complete the table and write the equation for the relationship shown in the graph.

x	y
0
10	10
12	12
17	17

ref_doc_title.

Learn with an example

question

Complete the table and write the equation for the relationship shown in the graph.

x	y
4	2
5
15	13
20	18

key idea

Each row in a table of

and

-values

represents an ordered pair.

An ordered pair

(

)

tells you the location of a point on the coordinate plane.

The
x
-coordinate
tells you the horizontal position.
The
y
-coordinate
tells you the vertical position.

solution

start of large bold text, Step 1: Complete the table., end of large bold text

Each row of the table represents a point on the line in the graph. Use the graph to find the missing value in the table.

Look at the second row.

x	y
4	2
5	?
15	13
20	18

To find the

-value

when the

-value

is 5, find the point on the line with an

-coordinate

of 5.

The point

(

)

is on the line and has an

-coordinate

of 5. Its

-coordinate

is 3.

x	y
4	2
5	3
15	13
20	18

start of large bold text, Step 2: Write the equation., end of large bold text

For each row of the table, the number in the

column is less than the number in the

column. Find how much less.

x	y
4	4 – 2 = 2
5	5 – 2 = 3
15	15 – 2 = 13
20	20 – 2 = 18

In each row of the table, the number in the

column is 2 less than the number in the

column. You can write the equation as:

–

Looking for more? Try this:

$Confetti$

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Teacher tools

Work it out

Not feeling ready yet? These can help:

MM.7Complete a table from a graph

CC.13Graph a relationship between two variables

CC.10Write a two-variable equation

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