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# graph y=2x by making a table

I really don't get this and need help!

### 2 Answers by Expert Tutors

Megan H. | Math Tutoring - All GradesMath Tutoring - All Grades
5.0 5.0 (308 lesson ratings) (308)
1
So to graph using a table, the first step is...well... make a table. so you have a column of x and y. under the x column write down a bunch of values you would like to test. I am going to test -2 through 2.
x | y
-2|
-1|
0 |
1 |
2 |

Next, we have to plug each of those values into the equation y=2x to see what the corresponding y value is.
when x=-2 y=2(-2)=-4, when x=-1 y=2(-1)=-2, and so on...
x | y
-2|-4
-1|-2
0 |0
1 |2
2 |4

Next, graph those points on a coordinate plane. Each row on the table is a point on the graph, (x,y).  Hope that helps!
Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
3.0 3.0 (1 lesson ratings) (1)
0
Hi Eli;
Let's make a table...
x | y
-2| -4
-1| -2
1 | 2
2 | 4

Let's make a graph...

4    X
3
2 X
1
__________0__________
-4-3-2-1 0 1 2 3 4
-1
X-2
-3
X   -4