# Writing an equation for a function graph

#### mdciccone

##### New member
I can't seem to figure out the equation for the following graph:

x y
-2 -8
-1 -1
0 0
1 1
2 8

#### Mrspi

##### Senior Member
mdciccone said:
I can't seem to figure out the equation for the following graph:

x y
-2 -8
-1 -1
0 0
1 1
2 8
What have you done to start this problem? Have you plotted the points? Does the graph look like it might be a line? If not, what do you think it might be?

What have you learned about the equation of this kind of graph?

We really can't help you until we see what you have done, what you know, and what your specific questions are.

#### mdciccone

##### New member
I plotted the points on the graph and it looks like the letter "U"

#### mdciccone

##### New member
I think I got it. y=x^3 (x cubed)

#### mmm4444bot

##### Super Moderator
Staff member
mdciccone said:
I plotted the points on the graph and it looks like the letter "U" This is incorrect.
mdciccone said:
I think I got it. y=x^3 This is correct.